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🍃 Growing Spinach in Zone 11b

Zone 11b has a year-round growing season. Spinach can be planted almost any time with proper planning. Last frost: Jan 15. First frost: Dec 31.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 4Dec 31

Season: Jan 15 – Dec 31 (350 days) · Succession: plant every 2 weeks (up to 22x)

Zone11b

Last FrostJan 15

First FrostDec 31

Season Length350 days

Days to Harvest40

SunPart Sun / Part Shade

Frost ToleranceHeavy

Spacing9/sqft (4" apart)

When to Plant Spinach in Zone 11b

Start Seeds Indoors: Dec 4

Start Spinach seeds indoors around Dec 4 (6 weeks before last frost). Optimal germination temperature: 60°F. Germinates in 6–14 days.

Transplant Outdoors: Dec 18

Transplant Spinach seedlings outdoors after Dec 18. Wait until soil temperature reaches 35°F. Space plants at 9/sqft (4" apart). Harden off plants for a week before moving outside.

Harvest: Jan 27

First harvest approximately Jan 27 (~40 days from planting). Continue harvesting until first frost (Dec 31). Spinach can overwinter in mild climates for continued harvest.

Fall Planting: Nov 19

For a fall harvest, plant Spinach around Nov 19 (6 weeks before first frost).

Companion Planting

✅ Cauliflower ✅ Cabbage✅ Beans✅ Strawberries

Spinach in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Frequently Asked Questions

When should I plant Spinach in Zone 11b?

Start Spinach seeds indoors around Dec 4. Transplant outdoors after Dec 18. Expect first harvest around Jan 27.

What is the last frost date for Zone 11b?

The average last spring frost date for Zone 11b is Jan 15. The first fall frost averages Dec 31, giving a 350-day growing season.

Can I grow Spinach in Zone 11b?

Yes. Spinach needs 40 days to harvest. Zone 11b has a 350-day growing season, which is sufficient. You can plant up to 22 successions.

What is the best month to plant Spinach in Zone 11b?

The best time to start Spinach in Zone 11b is Dec. Begin seeds indoors around Dec 4, then transplant outdoors after the last frost date of Jan 15.

What companion plants grow well with Spinach?

Good companion plants for Spinach include Cauliflower, Cabbage, Beans, Strawberries.

How long does Spinach take to harvest?

Spinach takes approximately 40 days from planting to harvest. In Zone 11b, expect your first harvest around Jan 27.

Plan Your Spinach Garden

Track Spinach from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

Start Free Spinach Growing Guide