When to plant rhubarb in zone 10b — planting calendar

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Showing USDA Zone 10B

Growing SeasonZone 10b

Last frost ~Jan 15First frost ~Dec 31Today

Start indoorsTransplant / sowHarvestFrost risk

DECJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNJUL

Transplant Jan 1 · First harvest Jul 3 · Wrap by Dec 31

Last spring frostJan 15

Transplant outJan 1

First harvestJul 3

Last harvestDec 31

First fall frostDec 31

Why these dates work in zone 10b

Zone 10b's last spring frost averages Jan 15 and first fall frost Dec 31 — about 350 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 10b?

Rhubarb matures in about 548–730 days from transplanting. In zone 10b that means setting plants out around Jan 1 and first picking around Jul 3.

Will rhubarb survive frost in zone 10b?

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

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