When to plant rhubarb in zone 9b — planting calendar

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Showing USDA Zone 9B

Growing SeasonZone 9b

Last frost ~Feb 15First frost ~Dec 10Today

Start indoorsTransplant / sowHarvestFrost risk

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNJULAUG

Transplant Feb 1 · First harvest Aug 3 · Wrap by Dec 10

Last spring frostFeb 15

Transplant outFeb 1

First harvestAug 3

Last harvestDec 10

First fall frostDec 10

Why these dates work in zone 9b

Zone 9b's last spring frost averages Feb 15 and first fall frost Dec 10 — about 298 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 9b?

Rhubarb matures in about 548–730 days from transplanting. In zone 9b that means setting plants out around Feb 1 and first picking around Aug 3.

Will rhubarb survive frost in zone 9b?

Yes — rhubarb tolerates light frost. In zone 9b you can set plants out a little before the last frost (around Feb 15) and keep harvesting past the first fall frost (around Dec 10).

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