Growing Leek in Zone 10a

Zone 10a has a year-round growing season. Leek can be planted almost any time with proper planning. Last frost: Feb 20. First frost: Dec 1.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 12Dec 1

Season: Feb 20 – Dec 1 (284 days)

Zone10a

Last FrostFeb 20

First FrostDec 1

Season Length284 days

Days to Harvest120

SunFull Sun

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Leek in Zone 10a

Start Seeds Indoors: Dec 12

Start Leek seeds indoors around Dec 12 (10 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 7–14 days.

Transplant Outdoors: Feb 6

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

Harvest: May 7

First harvest approximately May 7 (~90 days from transplant). Continue harvesting until first frost (Dec 1). 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

Frequently Asked Questions

When should I plant Leek in Zone 10a?

Start Leek seeds indoors around Dec 12. Transplant outdoors after Feb 6. Expect first harvest around May 7.

What is the last frost date for Zone 10a?

The average last spring frost date for Zone 10a is Feb 20. The first fall frost averages Dec 1, giving a 284-day growing season.

Can I grow Leek in Zone 10a?

Yes. Leek needs 120 days to harvest. Zone 10a has a 284-day growing season, which is sufficient.

What is the best month to plant Leek in Zone 10a?

The best time to start Leek in Zone 10a is Dec. Begin seeds indoors around Dec 12, then transplant outdoors after the last frost date of Feb 20.

What companion plants grow well with Leek?

Good companion plants for Leek include Carrots, Onions, Celery. Avoid planting Leek near Beans, Peas.

How long does Leek take to harvest?

Leek takes approximately 120 days from planting to harvest. In Zone 10a, expect your first harvest around May 7.

Plan Your Leek Garden

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

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