When should I plant Lettuce, Black Seeded Simpson in Zone 12a?

Start Lettuce, Black Seeded Simpson seeds indoors around Nov 20. Transplant outdoors after Dec 11. Expect first harvest around Jan 15.

What is the last frost date for Zone 12a?

The average last spring frost date for Zone 12a is Jan 1. The first fall frost averages Dec 31, giving a 364-day growing season.

Can I grow Lettuce, Black Seeded Simpson in Zone 12a?

Yes. Lettuce, Black Seeded Simpson needs 45 days to harvest. Zone 12a has a 364-day growing season, which is sufficient. You can plant up to 22 successions.

Lettuce, Black Seeded Simpson illustration

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🥬 Growing Lettuce, Black Seeded Simpson in Zone 12a

Zone 12a has a year-round growing season. Lettuce, Black Seeded Simpson can be planted almost any time with proper planning. Last frost: Jan 1. First frost: Dec 31.

Planting Calendar

Indoor

Outdoor

Harvest

Nov 20Dec 31

Season: Jan 1 – Dec 31 (364 days) · Succession: plant every 2 weeks (up to 22x)

Zone12a

Last FrostJan 1

First FrostDec 31

Season Length364 days

Days to Harvest45

SunPart Sun / Part Shade

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Lettuce, Black Seeded Simpson in Zone 12a

Start Seeds Indoors: Nov 20

Start Lettuce, Black Seeded Simpson seeds indoors around Nov 20 (6 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 4–10 days.

Transplant Outdoors: Dec 11

Transplant Lettuce, Black Seeded Simpson seedlings outdoors after Dec 11. Wait until soil temperature reaches 40°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Jan 15

First harvest approximately Jan 15 (~35 days from transplant). Continue harvesting until first frost (Dec 31).

Fall Planting: Nov 5

For a fall harvest, plant Lettuce, Black Seeded Simpson around Nov 5 (8 weeks before first frost).

Companion Planting

✅ Strawberries✅ Carrots✅ Beets✅ Cucumbers✅ Radishes

Lettuce, Black Seeded Simpson 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, Black Seeded Simpson Garden

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

Start Free Lettuce, Black Seeded Simpson Growing Guide