Spinach

Basic Information

Seed Number

177

Seed Name

Spinach

Variety

Giant Noble

Category

Vegetable

Plant Family

Amaranthaceae

Plant Type

Smooth-leaf spinach (Spinacia oleracea)

Planting Method

Direct Sow

Seed Status

In Seed Bank

Created

2026-08-14 00:50:34

Updated

2026-08-19 15:35:29

Planting Information

Start Planting Date

Mar 15

Last Recommended Planting Date

Sep 15

Plantable Months

March, April, May, August, September

Indoor Start

Mar 24 – Apr 7

Direct Sow

Mar 15 – Sep 15

Transplant

Apr 15 – Apr 30

Indoor Start Weeks Before Frost

6 weeks

Transplant Weeks After Frost

Not recorded

Germination Days

7–21 days

Harvest/Maturity

40–50 days to leaf harvest

Succession Planting

14 days

Growing Conditions

Ideal Soil Temperature

40-70°F

Planting Depth

1/2 in

Plant Spacing

4-6 in

Row Spacing

12 in

Thin-To Spacing

6-12 in

Sun Requirements

Full sun to partial shade

Water Needs

Maintain consistent moisture but avoid saturated soil

Soil Preference

Fertile, compost-amended, well-drained soil; approximately pH 6.5-7.0

Minimum Container Size

6-8 in deep

Plant Height

Up to 20 in

Perennial/Biennial Status

Annual

Container Friendly

Yes

Trellis/Support Needed

No

Frost Tolerant

Yes

Heat Tolerant

No

Drought Tolerant

No

Pollinator Friendly

No

Medicinal

No

Garden Uses

Companion Planting

Storage

Seed Source/Brand

True Leaf Market; MSU Extension

Packet Year

Not recorded

Quantity Notes

Not recorded

Purchase Date

Not recorded

Expiration Year

Not recorded

Storage Box

Not recorded

Container

Not recorded

Envelope

Not recorded

Row

Not recorded

Slot

Not recorded

Storage Notes

Not recorded

Notes

Original Planting Method: Direct sow
Outdoor / Direct Sow / Transplant Window: Mar 15 – May 1; Aug 10 – Sep 1
Days to Harvest / Bloom: About 40–50 days
Container Friendly: Yes, 6+ in deep
Pollinator Friendly: Low; mainly wind-pollinated when flowering
Medicinal / Herbal Use: Culinary leafy green
Perennial?: No; annual
Succession / Reusable Notes: Sow every 10–14 days in cool weather; harvest outer leaves repeatedly.
Zone 6B Notes: Good spring/fall spinach for Zone 6B; heat is still the main limit.
Companion Plants: Peas, radishes, lettuce, brassicas, onions
Avoid Planting Near / Watch Outs: More bolt-resistant than some spinach, but high heat still causes bolting. Give mature plants room because leaves get large.
Sources: True Leaf Market: https://trueleafmarket.com/products/spinach-giant-noble-seeds | MSU Extension: https://www.canr.msu.edu/resources/garden_planning_calendar

[[RESEARCH ENRICHMENT START]]
Zone 6B: Giant Noble is a cool-season spinach. Direct sow in early spring and again in late summer for fall harvest. It is slower to bolt than many spinach varieties but still performs best below sustained summer heat.
Germination: Direct sowing is preferred. Seed germinates in approximately 7-21 days depending on soil temperature.
Harvest: Harvest large outer leaves while leaving smaller central leaves to continue growing. Giant Noble produces exceptionally large, thick, smooth dark-green leaves.
Seed Saving: Spinach is wind-pollinated and varieties cross readily. Save seed from multiple healthy plants for genetic diversity and isolate from other flowering spinach varieties.
Special Care: Also sold as Giant Nobel by some seed companies. Plants can reach approximately 20 inches tall and spread up to about 25 inches.
Research Source: True Leaf Market — https://trueleafmarket.com/products/spinach-giant-noble-seeds — Giant Noble identity, 7-21 day germination, 40-50 day leaf maturity, 1/2-inch depth, spacing, soil, temperature and slow-bolt characteristics
Research Source: Everwilde Farms — https://www.everwilde.com/store/Giant-Noble-Spinach-Seeds.html — approximately 45-day maturity, 20-inch height and spinach seed-saving guidance
[[RESEARCH ENRICHMENT END]]