When to plant mustard greens 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

JANFEBMAR

Sow Jan 18 · First harvest Feb 12 · Wrap by Mar 12

Last spring frostFeb 15

Direct sowJan 18

First harvestFeb 12

Last harvestMar 12

Fall succession sowOct 29

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. Mustard Greens tolerates light frost, so you can sow ahead of the last-frost date and keep harvesting into the cooler fall. There's also room for a fall succession sowing around Oct 29 for a second harvest before frost.

Common questions

How long does mustard greens take to grow in zone 9b?

Mustard Greens matures in about 25–40 days from sowing. In zone 9b that means sowing around Jan 18 and first picking around Feb 12.

Will mustard greens survive frost in zone 9b?

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

Can I plant a second crop of mustard greens in zone 9b?

Yes — in zone 9b there's time for a fall sowing around Oct 29 for a second harvest before frost.

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