When should I plant Lettuce in Zone 10b?

Start Lettuce seeds indoors around Dec 17. Transplant outdoors after Jan 7. Expect first harvest around Feb 11.

What is the last frost date for Zone 10b?

The average last spring frost date for Zone 10b is Jan 28. The first fall frost averages Dec 22, giving a 328-day growing season.

Can I grow Lettuce in Zone 10b?

Yes. Lettuce needs 45 days to harvest. Zone 10b has a 328-day growing season, which is sufficient. You can plant up to 20 successions.

🥬

🥬 Growing Lettuce in Zone 10b

Zone 10b has a year-round growing season. Lettuce can be planted almost any time with proper planning. Last frost: Jan 28. First frost: Dec 22.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 17Dec 22

Season: Jan 28 – Dec 22 (328 days) · Succession: plant every 2 weeks (up to 20x)

Zone10b

Last FrostJan 28

First FrostDec 22

Season Length328 days

Days to Harvest45

SunPart Sun / Part Shade

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Lettuce in Zone 10b

Start Seeds Indoors: Dec 17

Start Lettuce seeds indoors around Dec 17 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 4–10 days.

Transplant Outdoors: Jan 7

Transplant Lettuce seedlings outdoors after Jan 7. Wait until soil temperature reaches 40°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Feb 11

First harvest approximately Feb 11 (~35 days from transplant). Continue harvesting until first frost (Dec 22).

Fall Planting: Oct 27

For a fall harvest, plant Lettuce around Oct 27 (8 weeks before first frost).

Companion Planting

✅ Strawberries✅ Carrots✅ Beets✅ Cucumbers✅ Radishes

Lettuce 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

Plan Your Lettuce Garden

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

Start Free Lettuce Growing Guide