Growing Leek in Zone 9b

Zone 9b has warm winters and an extended growing season — excellent for heat-loving crops like Leek. Last frost: Mar 10. First frost: Nov 15.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 30Nov 15

Season: Mar 10 – Nov 15 (250 days)

Zone9b

Last FrostMar 10

First FrostNov 15

Season Length250 days

Days to Harvest120

SunFull Sun

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Leek in Zone 9b

Start Seeds Indoors: Dec 30

Start Leek seeds indoors around Dec 30 (10 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 7–14 days.

Transplant Outdoors: Feb 24

Transplant Leek seedlings outdoors after Feb 24. 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 25

First harvest approximately May 25 (~90 days from transplant). Continue harvesting until first frost (Nov 15). 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 9b?

Start Leek seeds indoors around Dec 30. Transplant outdoors after Feb 24. Expect first harvest around May 25.

What is the last frost date for Zone 9b?

The average last spring frost date for Zone 9b is Mar 10. The first fall frost averages Nov 15, giving a 250-day growing season.

Can I grow Leek in Zone 9b?

Yes. Leek needs 120 days to harvest. Zone 9b has a 250-day growing season, which is sufficient.

What is the best month to plant Leek in Zone 9b?

The best time to start Leek in Zone 9b is Dec. Begin seeds indoors around Dec 30, then transplant outdoors after the last frost date of Mar 10.

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 9b, expect your first harvest around May 25.

Plan Your Leek Garden

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

Start Free Leek Growing Guide