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← How to grow mustard greens
Planting Calendar · Zone 3B

When to plant mustard greens in zone 3b

In USDA zone 3b, sow mustard greens around Apr 8, and harvest from May 3.

Growing SeasonZone 3b
Last frost ~May 6First frost ~Oct 22Today
Start indoorsTransplant / sowHarvestFrost risk
MARAPRMAYJUN
Sow Apr 8 · First harvest May 3 · Wrap by May 31
Last spring frostMay 6
Direct sowApr 8
First harvestMay 3
Last harvestMay 31
Fall succession sowSep 10
First fall frostOct 22

Why these dates work in zone 3b

Zone 3b's last spring frost averages May 6 and first fall frost Oct 22 — about 169 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 Sep 10 for a second harvest before frost.

Common questions

How long does mustard greens take to grow in zone 3b?

Mustard Greens matures in about 25–40 days from sowing. In zone 3b that means sowing around Apr 8 and first picking around May 3.

Will mustard greens survive frost in zone 3b?

Yes — mustard greens tolerates light frost. In zone 3b you can sow a little before the last frost (around May 6) and keep harvesting past the first fall frost (around Oct 22).

Can I plant a second crop of mustard greens in zone 3b?

Yes — in zone 3b there's time for a fall sowing around Sep 10 for a second harvest before frost.

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