Growing Leek in Zone 1b

Zone 1b has harsh winters and a short growing season. Start Leek early indoors to maximize your harvest window. Last frost: May 25. First frost: Aug 28.

Season Too Short

Leek needs 120 days to harvest, but Zone 1b has only a 95-day growing season. Consider short-season varieties or season extension techniques (cold frames, row covers).

Zone1b

Last FrostMay 25

First FrostAug 28

Season Length95 days

Days to Harvest120

SunFull Sun

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Leek in Zone 1b

Start Seeds Indoors: Mar 16

Start Leek seeds indoors around Mar 16 (10 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 7–14 days.

Transplant Outdoors: May 11

Transplant Leek seedlings outdoors after May 11. Wait until soil temperature reaches 45°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Aug 9

First harvest approximately Aug 9 (~90 days from transplant). Continue harvesting until first frost (Aug 28). 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 1b?

Start Leek seeds indoors around Mar 16. Transplant outdoors after May 11. Expect first harvest around Aug 9.

What is the last frost date for Zone 1b?

The average last spring frost date for Zone 1b is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.

Can I grow Leek in Zone 1b?

Zone 1b has a 95-day growing season, which may be too short for Leek (120 days needed). Consider short-season varieties or season extension techniques.

What is the best month to plant Leek in Zone 1b?

The best time to start Leek in Zone 1b is Mar. Begin seeds indoors around Mar 16, then transplant outdoors after the last frost date of May 25.

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 1b, expect your first harvest around Aug 9.

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