When to plant radish in zone 3a — planting calendar

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Showing USDA Zone 3A

Growing SeasonZone 3a

Last frost ~May 30First frost ~Sep 10Today

Start indoorsTransplant / sowHarvestFrost risk

APRMAYJUN

Sow May 2 · First harvest May 24 · Wrap by Jun 7

Last spring frostMay 30

Direct sowMay 2

First harvestMay 24

Last harvestJun 7

Fall succession sowJul 30

First fall frostSep 10

Why these dates work in zone 3a

Zone 3a's last spring frost averages May 30 and first fall frost Sep 10 — about 103 frost-free days. Radish 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 Jul 30 for a second harvest before frost.

Common questions

How long does radish take to grow in zone 3a?

Radish matures in about 22–30 days from sowing. In zone 3a that means sowing around May 2 and first picking around May 24.

Will radish survive frost in zone 3a?

Yes — radish tolerates light frost. In zone 3a you can sow a little before the last frost (around May 30) and keep harvesting past the first fall frost (around Sep 10).

Can I plant a second crop of radish in zone 3a?

Yes — in zone 3a there's time for a fall sowing around Jul 30 for a second harvest before frost.

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