When should I plant Leek in Zone 5b?

Start Leek seeds indoors around Feb 17. Transplant outdoors after Apr 14. Expect first harvest around Jul 13.

What is the last frost date for Zone 5b?

The average last spring frost date for Zone 5b is Apr 28. The first fall frost averages Oct 8, giving a 163-day growing season.

Can I grow Leek in Zone 5b?

Yes. Leek needs 120 days to harvest. Zone 5b has a 163-day growing season, which is sufficient.

Growing Leek in Zone 5b

Zone 5b has cold winters and a moderate growing season. Timing is key for Leek in this zone. Last frost: Apr 28. First frost: Oct 8.

Planting Calendar

Indoor

Outdoor

Harvest

Feb 17Oct 8

Season: Apr 28 – Oct 8 (163 days)

Zone5b

Last FrostApr 28

First FrostOct 8

Season Length163 days

Days to Harvest120

SunFull Sun

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Leek in Zone 5b

Start Seeds Indoors: Feb 17

Start Leek seeds indoors around Feb 17 (10 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 7–14 days.

Transplant Outdoors: Apr 14

Transplant Leek seedlings outdoors after Apr 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: Jul 13

First harvest approximately Jul 13 (~90 days from transplant). Continue harvesting until first frost (Oct 8). 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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