Cold-season planning

Winter Sowing Planner

Eligibility comes only from explicit winter-sowing research fields.

Ready to sow

March Eligible Seeds

Arugula — Slow Bolt

Cold stratification: Not Required
Hardiness: Hardy

Asters — Gala Lavender

Cold stratification: Not Required
Hardiness: Tender

Asters — Krallen Dark Purple

Cold stratification: Not Required
Hardiness: Hardy

Asters — Pompom Constellation

Cold stratification: Not Required
Hardiness: Tender

Asters — Purple

Cold stratification: Not Required
Hardiness: Tender

Bachelor Button — Black

Cold stratification: Not Required
Hardiness: Hardy

Bachelor Button — Mix

Cold stratification: Not Required
Hardiness: Hardy

Black Cumin

Cold stratification: Not Required
Hardiness: Hardy

Broccoli — De Cicco

Cold stratification: Not Required
Hardiness: Hardy

Broccoli — Green Sprouting Calabrese

Cold stratification: Not Required
Hardiness: Hardy

Brussel Sprouts — Long Island

Cold stratification: Not Required
Hardiness: Hardy

Cabbage — Red Acre

Cold stratification: Not Required
Hardiness: Hardy

Calendula — Oktoberfest

Cold stratification: Not Required
Hardiness: Hardy

Calendula — Pacific Beauty

Cold stratification: Not Required
Hardiness: Hardy

Celosia — Kumquat Orange

Cold stratification: Not Required
Hardiness: Tender

Celosia — Mauve & Red mix

Cold stratification: Not Required
Hardiness: Tender

Celosia — Pastel Mix

Cold stratification: Not Required
Hardiness: Tender

Chamomile — German

Cold stratification: Not Required
Hardiness: Hardy

Cleome — Color Fountain Mix

Cold stratification: Not Required
Hardiness: Tender

Ground Cherry — Aunt Molly

Cold stratification: Not Required
Hardiness: Tender

Kale — Siberian

Cold stratification: Not Required
Hardiness: Hardy

Lettuce — Black Seeded Simpson

Cold stratification: Not Required
Hardiness: Hardy

Lettuce — Grand Rapids

Cold stratification: Not Required
Hardiness: Hardy

Lettuce — Iceberg

Cold stratification: Not Required
Hardiness: Hardy

Lettuce — Mesclun

Cold stratification: Not Required
Hardiness: Hardy

Lettuce — Parris Island Cos (Romaine)

Cold stratification: Not Required
Hardiness: Hardy

Marigold — Crackerjack

Cold stratification: Not Required
Hardiness: Tender

Marigold — French

Cold stratification: Not Required
Hardiness: Tender

Marigold — French Dwarf

Cold stratification: Not Required
Hardiness: Tender

Marigold — Sparky Mix

Cold stratification: Not Required
Hardiness: Tender

Milk Thistle

Cold stratification: Not Required
Hardiness: Hardy

Onion — Ailsa Craig

Cold stratification: Not Required
Hardiness: Hardy

Onion — Cipollini

Cold stratification: Not Required
Hardiness: Hardy

Onion — Egyptian Walking

Cold stratification: Not Required
Hardiness: Hardy

Onion — Sweet Spanish

Cold stratification: Not Required
Hardiness: Hardy

Onion — Tokyo Long White Bunching

Cold stratification: Not Required
Hardiness: Hardy

Onion — Walla Walla

Cold stratification: Not Required
Hardiness: Hardy

Onion — White Lisbon Bunching

Cold stratification: Not Required
Hardiness: Hardy

Parsley — Big Italy

Cold stratification: Not Required
Hardiness: Hardy

Snapdragon — Unknown

Cold stratification: Not Required
Hardiness: Hardy

Sorrel — Large Leaf

Cold stratification: Not Required
Hardiness: Hardy

Spinach — America

Cold stratification: Not Required
Hardiness: Hardy

Spinach — Giant Noble

Cold stratification: Not Required
Hardiness: Hardy

Spinach — Unknown

Cold stratification: Not Required
Hardiness: Hardy

Sunflower — American Giant

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Autumn Beauty

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Black Beauty

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Black Oil

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Bohemian Rhapsody

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Chocolate Cherry

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Evening Sun Mixed

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Grey striped mammoth

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Mammoth

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Mammoth Russian

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Mixed Colors

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Moonwalk

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Procut White Lite

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Skyscraper

Cold stratification: Not Required
Hardiness: Tender

Sunflower — Teddy Bear

Cold stratification: Not Required
Hardiness: Tender

Tomato — Amish Paste

Cold stratification: Not Required
Hardiness: Tender

Tomato — Big Mama Hybrid

Cold stratification: Not Required
Hardiness: Tender

Tomato — Black Bear

Cold stratification: Not Required
Hardiness: Tender

Tomato — Federle

Cold stratification: Not Required
Hardiness: Tender

Tomato — Little Red Corvette

Cold stratification: Not Required
Hardiness: Tender

Tomato — Peron Sprayless

Cold stratification: Not Required
Hardiness: Tender

Tomato — Red Cherry

Cold stratification: Not Required
Hardiness: Tender

Tomato — Red Pear

Cold stratification: Not Required
Hardiness: Tender

Tomato — Roma

Cold stratification: Not Required
Hardiness: Tender

Tomato — San Marzano

Cold stratification: Not Required
Hardiness: Tender

Zinnia — California Giant

Cold stratification: Not Required
Hardiness: Tender

Zinnia — Candy Cane

Cold stratification: Not Required
Hardiness: Tender

Zinnia — Lilliput Mix

Cold stratification: Not Required
Hardiness: Tender

Zinnia — Purple Prince

Cold stratification: Not Required
Hardiness: Tender

Zinnia — Queen Lime

Cold stratification: Not Required
Hardiness: Tender

Zinnia — Semi-dwarf Pumila MC

Cold stratification: Not Required
Hardiness: Tender

Zinnia — Yellow

Cold stratification: Not Required
Hardiness: Tender

Seed research

Structured Research Fields

17 seed(s) remain unknown/unresearched. Research is displayed read-only.

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Beans need warm soil and are normally direct sown after the soil warms.
Source: University of Minnesota Extension — Growing beans in home gardens: https://extension.umn.edu/vegetables/growing-beans

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. Cold exposure is not required for bee balm, but January-February sowing is suitable for a hardy perennial.
Source: Lady Bird Johnson Wildflower Center — Monarda fistulosa seed treatment: https://www.wildflower.org/plants/result.php?id_plant=mofi | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. This crop is normally direct sown and develops a root that is best left undisturbed.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. Sow in January-February so outdoor cold provides the required stratification period.
Source: Lady Bird Johnson Wildflower Center — Verbena hastata seed treatment: https://www.wildflower.org/plants/result.php?id_plant=veha2 | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Melons need warmth and are especially sensitive to root disturbance.
Source: University of Minnesota Extension — Growing melons in the home garden: https://extension.umn.edu/gardening-minnesota/growing-melons-home-garden

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Melons need warmth and are especially sensitive to root disturbance.
Source: University of Minnesota Extension — Growing melons in the home garden: https://extension.umn.edu/gardening-minnesota/growing-melons-home-garden

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Melons need warmth and are especially sensitive to root disturbance.
Source: University of Minnesota Extension — Growing melons in the home garden: https://extension.umn.edu/gardening-minnesota/growing-melons-home-garden

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Melons need warmth and are especially sensitive to root disturbance.
Source: University of Minnesota Extension — Growing melons in the home garden: https://extension.umn.edu/gardening-minnesota/growing-melons-home-garden

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. This crop is normally direct sown and develops a root that is best left undisturbed.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. This crop is normally direct sown and develops a root that is best left undisturbed.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. This crop is normally direct sown and develops a root that is best left undisturbed.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. This crop is normally direct sown and develops a root that is best left undisturbed.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Required
Hardiness: Hardy
Eligible months: December, January, February
Notes: Suitable for early winter sowing to provide a long natural dormancy-breaking period. Rose seed can germinate slowly and may need more than one season.
Source: USDA Forest Service — Woody Plant Seed Manual (Rosa/Sambucus): https://www.fs.usda.gov/rm/pubs_series/wo/wo_ah727.pdf | MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Required
Hardiness: Hardy
Eligible months: December, January, February
Notes: Suitable for early winter sowing, but elderberry has complex seed dormancy. A long natural cold period helps; germination may be slow or delayed beyond the first spring.
Source: Lady Bird Johnson Wildflower Center — Sambucus canadensis seed treatment: https://www.wildflower.org/plants/result.php?id_plant=sanic4 | MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: Lady Bird Johnson Wildflower Center — Solidago seed treatment: https://www.wildflower.org/plants/result.php?id_plant=SOSP2 | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; ground cherry is tender and seedlings should not be exposed to hard freezes.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Hibiscus species is not identified. Hardiness and dormancy requirements vary, so winter-sowing suitability cannot be assigned reliably.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Suitable for winter sowing as a hardy hibiscus. Sow in January-February; scarifying the seed coat may also improve germination.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Nasturtiums are frost-sensitive and are normally direct sown to avoid root disturbance.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Nasturtiums are frost-sensitive and are normally direct sown to avoid root disturbance.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. This crop is normally direct sown and develops a root that is best left undisturbed.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Mixture contains unspecified annual, biennial and perennial species, so a reliable milk-jug winter-sowing window cannot be assigned without the species list.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Suitable
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: January, February
Notes: Suitable as a general perennial winter-sowing mix, but individual species may have different dormancy needs.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Unknown
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Unknown
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. This crop is normally direct sown and develops a root that is best left undisturbed.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. This crop is normally direct sown and develops a root that is best left undisturbed.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. This crop is normally direct sown and develops a root that is best left undisturbed.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. This crop is normally direct sown and develops a root that is best left undisturbed.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Required
Hardiness: Hardy
Eligible months: December, January, February
Notes: Suitable for early winter sowing to provide a long natural dormancy-breaking period. Rose seed can germinate slowly and may need more than one season.
Source: USDA Forest Service — Woody Plant Seed Manual (Rosa/Sambucus): https://www.fs.usda.gov/rm/pubs_series/wo/wo_ah727.pdf | MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners

Suitability: Suitable
Cold stratification: Required
Hardiness: Unknown
Eligible months: December, January, February
Notes: Suitable for early winter sowing to provide a long natural dormancy-breaking period. Rose seed can germinate slowly and may need more than one season.
Source: USDA Forest Service — Woody Plant Seed Manual (Rosa/Sambucus): https://www.fs.usda.gov/rm/pubs_series/wo/wo_ah727.pdf | MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. Rosemary is not winter hardy in Michigan; start indoors instead.
Source: MSU Extension — Rosemary: The herb with winter problems: https://www.canr.msu.edu/news/rosemary_the_herb_with_winter_problems

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: February, March
Notes: Suitable for milk-jug winter sowing as a hardy/cool-season seed. Sow in February-March; seedlings can handle cool spring conditions.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for the milk-jug winter-sowing workflow. This warm-season crop needs warm conditions and is better direct sown or started separately near planting time.
Source: University of Minnesota Extension — Growing summer squash and zucchini in home gardens: https://extension.umn.edu/vegetables/growing-summer-squash-and-zucchini | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Beneficial
Hardiness: Hardy
Eligible months: January, February
Notes: Good milk-jug winter-sowing candidate. January-February outdoor exposure can provide beneficial cold stratification and freeze-thaw cycles.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; seedlings are frost-sensitive, so keep the jug protected during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; seedlings are frost-sensitive, so keep the jug protected during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; seedlings are frost-sensitive, so keep the jug protected during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; seedlings are frost-sensitive, so keep the jug protected during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; seedlings are frost-sensitive, so keep the jug protected during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; seedlings are frost-sensitive, so keep the jug protected during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; seedlings are frost-sensitive, so keep the jug protected during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; seedlings are frost-sensitive, so keep the jug protected during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; seedlings are frost-sensitive, so keep the jug protected during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March; seedlings are frost-sensitive, so keep the jug protected during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for outdoor milk-jug winter sowing in Zone 6B. This is a warm-season/tender plant that needs warmer germination and growing conditions.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Unknown
Cold stratification: Unknown
Hardiness: Unknown
Eligible months: Not recorded
Notes: Not recorded
Source: Not recorded

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Melons need warmth and are especially sensitive to root disturbance.
Source: University of Minnesota Extension — Growing melons in the home garden: https://extension.umn.edu/gardening-minnesota/growing-melons-home-garden

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Melons need warmth and are especially sensitive to root disturbance.
Source: University of Minnesota Extension — Growing melons in the home garden: https://extension.umn.edu/gardening-minnesota/growing-melons-home-garden

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Melons need warmth and are especially sensitive to root disturbance.
Source: University of Minnesota Extension — Growing melons in the home garden: https://extension.umn.edu/gardening-minnesota/growing-melons-home-garden

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Melons need warmth and are especially sensitive to root disturbance.
Source: University of Minnesota Extension — Growing melons in the home garden: https://extension.umn.edu/gardening-minnesota/growing-melons-home-garden

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: Not recorded
Notes: Not recommended for milk-jug winter sowing. Melons need warmth and are especially sensitive to root disturbance.
Source: University of Minnesota Extension — Growing melons in the home garden: https://extension.umn.edu/gardening-minnesota/growing-melons-home-garden

Suitability: Not Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: Not recorded
Notes: Not recommended for the milk-jug transplant method. It is better direct sown outdoors at its normal planting time.
Source: University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing | Illinois Extension — When to plant: https://extension.illinois.edu/gardening/when-plant

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Hardy
Eligible months: January, February
Notes: Good hardy milk-jug winter-sowing candidate. Sow in January-February and let seedlings emerge naturally as conditions warm.
Source: MSU Extension — Winter sowing in containers for Michigan gardeners: https://www.canr.msu.edu/news/winter-sowing-in-containers-for-michigan-gardeners | University of Minnesota Extension — Jug it and grow: winter sowing for pollinator gardens: https://extension.umn.edu/yard-and-garden-news/jug-it-and-grow-winter-sowing-pollinator-gardens

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Suitability: Suitable
Cold stratification: Not Required
Hardiness: Tender
Eligible months: March
Notes: Late winter sow only. Sow in March because seedlings are frost-sensitive; protect during hard freezes and transplant after frost danger.
Source: Illinois Extension — January and February are prime time for winter sowing: https://extension.illinois.edu/blogs/ilriverhort/2023-12-29-january-and-february-are-prime-time-winter-sowing | University of Minnesota Extension — A Minnesota guide to garden timing: https://extension.umn.edu/yard-and-garden-news/minnesota-guide-garden-timing

Winter Sowing Planner

March Eligible Seeds

Arugula — Slow Bolt

Asters — Gala Lavender

Asters — Krallen Dark Purple

Asters — Pompom Constellation

Asters — Purple

Bachelor Button — Black

Bachelor Button — Mix

Black Cumin

Broccoli — De Cicco

Broccoli — Green Sprouting Calabrese

Brussel Sprouts — Long Island

Cabbage — Red Acre

Calendula — Oktoberfest

Calendula — Pacific Beauty

Celosia — Kumquat Orange

Celosia — Mauve & Red mix

Celosia — Pastel Mix

Chamomile — German

Cleome — Color Fountain Mix

Ground Cherry — Aunt Molly

Kale — Siberian

Lettuce — Black Seeded Simpson

Lettuce — Grand Rapids

Lettuce — Iceberg

Lettuce — Mesclun

Lettuce — Parris Island Cos (Romaine)

Marigold — Crackerjack

Marigold — French

Marigold — French Dwarf

Marigold — Sparky Mix

Milk Thistle

Onion — Ailsa Craig

Onion — Cipollini

Onion — Egyptian Walking

Onion — Sweet Spanish

Onion — Tokyo Long White Bunching

Onion — Walla Walla

Onion — White Lisbon Bunching

Parsley — Big Italy

Snapdragon — Unknown

Sorrel — Large Leaf

Spinach — America

Spinach — Giant Noble

Spinach — Unknown

Sunflower — American Giant

Sunflower — Autumn Beauty

Sunflower — Black Beauty

Sunflower — Black Oil

Sunflower — Bohemian Rhapsody

Sunflower — Chocolate Cherry

Sunflower — Evening Sun Mixed

Sunflower — Grey striped mammoth

Sunflower — Mammoth

Sunflower — Mammoth Russian

Sunflower — Mixed Colors

Sunflower — Moonwalk

Sunflower — Procut White Lite

Sunflower — Skyscraper

Sunflower — Teddy Bear

Tomato — Amish Paste

Tomato — Big Mama Hybrid

Tomato — Black Bear

Tomato — Federle

Tomato — Little Red Corvette

Tomato — Peron Sprayless

Tomato — Red Cherry

Tomato — Red Pear

Tomato — Roma

Tomato — San Marzano

Zinnia — California Giant

Zinnia — Candy Cane

Zinnia — Lilliput Mix

Zinnia — Purple Prince

Zinnia — Queen Lime

Zinnia — Semi-dwarf Pumila MC

Zinnia — Yellow

Structured Research Fields

54Alfalfa Not Suitable