When should I plant Leek in Zone 10b?

Start Leek seeds indoors around Nov 19. Transplant outdoors after Jan 14. Expect first harvest around Apr 14.

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 Leek in Zone 10b?

Yes. Leek needs 120 days to harvest. Zone 10b has a 328-day growing season, which is sufficient.

Growing Leek in Zone 10b

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

Planting Calendar

Indoor

Outdoor

Harvest

Nov 19Dec 22

Season: Jan 28 – Dec 22 (328 days)

Zone10b

Last FrostJan 28

First FrostDec 22

Season Length328 days

Days to Harvest120

SunFull Sun

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Leek in Zone 10b

Start Seeds Indoors: Nov 19

Start Leek seeds indoors around Nov 19 (10 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 7–14 days.

Transplant Outdoors: Jan 14

Transplant Leek seedlings outdoors after Jan 14. Wait until soil temperature reaches 45°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Apr 14

First harvest approximately Apr 14 (~90 days from transplant). Continue harvesting until first frost (Dec 22). Leek can overwinter in mild climates for continued harvest.

Companion Planting

✅ Carrots✅ Onions✅ Celery

❌ Beans❌ Peas

Leek 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 Leek Garden

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

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