When to plant rhubarb 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

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNJUL

Transplant Jan 17 · First harvest Jul 19 · Wrap by Dec 15

Last spring frostJan 31

Transplant outJan 17

First harvestJul 19

Last harvestDec 15

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. Rhubarb tolerates light frost, so you can set plants out ahead of the last-frost date and keep harvesting into the cooler fall.

Common questions

How long does rhubarb take to grow in zone 10a?

Rhubarb matures in about 548–730 days from transplanting. In zone 10a that means setting plants out around Jan 17 and first picking around Jul 19.

Will rhubarb survive frost in zone 10a?

Yes — rhubarb 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 rhubarb growing guide →