When to plant rhubarb in zone 9a — planting calendar

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Showing USDA Zone 9A

Growing SeasonZone 9a

Last frost ~Feb 28First frost ~Nov 30Today

Start indoorsTransplant / sowHarvestFrost risk

FEBMARAPRMAYJUNJULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNJULAUG

Transplant Feb 14 · First harvest Aug 16 · Wrap by Nov 30

Last spring frostFeb 28

Transplant outFeb 14

First harvestAug 16

Last harvestNov 30

First fall frostNov 30

Why these dates work in zone 9a

Zone 9a's last spring frost averages Feb 28 and first fall frost Nov 30 — about 275 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 9a?

Rhubarb matures in about 548–730 days from transplanting. In zone 9a that means setting plants out around Feb 14 and first picking around Aug 16.

Will rhubarb survive frost in zone 9a?

Yes — rhubarb tolerates light frost. In zone 9a you can set plants out a little before the last frost (around Feb 28) and keep harvesting past the first fall frost (around Nov 30).

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