When to plant leek in zone 6b — planting calendar

Not your zone?

Showing USDA Zone 6B

Growing SeasonZone 6b

Last frost ~Apr 20First frost ~Oct 15Today

Start indoorsTransplant / sowHarvestFrost risk

JANFEBMARAPRMAYJUNJULAUGSEP

Start indoors Jan 26 · Transplant Apr 6 · First harvest Jul 15 · Wrap by Sep 9

Last spring frostApr 20

Start seeds indoorsJan 26

Transplant outApr 6

First harvestJul 15

Last harvestSep 9

First fall frostOct 15

Why these dates work in zone 6b

Zone 6b's last spring frost averages Apr 20 and first fall frost Oct 15 — about 178 frost-free days. Leek tolerates light frost, so you can set plants out ahead of the last-frost date and keep harvesting into the cooler fall. Starting seeds indoors 12 weeks ahead gives strong transplants ready the moment the soil warms.

Common questions

How long does leek take to grow in zone 6b?

Leek matures in about 100–120 days from transplanting. In zone 6b that means setting plants out around Apr 6 and first picking around Jul 15.

Will leek survive frost in zone 6b?

Yes — leek tolerates light frost. In zone 6b you can set plants out a little before the last frost (around Apr 20) and keep harvesting past the first fall frost (around Oct 15).

For soil, spacing, pests and companion planting, see the full leek growing guide →