When to plant leek in zone 10a — planting calendar

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Showing USDA Zone 10A

Growing SeasonZone 10a

Last frost ~Jan 31First frost ~Dec 15Today

Start indoorsTransplant / sowHarvestFrost risk

OCTNOVDECJANFEBMARAPRMAYJUNJUL

Start indoors Nov 8 · Transplant Jan 17 · First harvest Apr 27 · Wrap by Jun 22

Last spring frostJan 31

Start seeds indoorsNov 8

Transplant outJan 17

First harvestApr 27

Last harvestJun 22

First fall frostDec 15

Why these dates work in zone 10a

Zone 10a's last spring frost averages Jan 31 and first fall frost Dec 15 — about 318 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 10a?

Leek matures in about 100–120 days from transplanting. In zone 10a that means setting plants out around Jan 17 and first picking around Apr 27.

Will leek survive frost in zone 10a?

Yes — leek tolerates light frost. In zone 10a you can set plants out a little before the last frost (around Jan 31) and keep harvesting past the first fall frost (around Dec 15).

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