When to plant radish in zone 5a — planting calendar

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Showing USDA Zone 5A

Growing SeasonZone 5a

Last frost ~May 10First frost ~Oct 1Today

Start indoorsTransplant / sowHarvestFrost risk

APRMAY

Sow Apr 12 · First harvest May 4 · Wrap by May 18

Last spring frostMay 10

Direct sowApr 12

First harvestMay 4

Last harvestMay 18

Fall succession sowAug 20

First fall frostOct 1

Why these dates work in zone 5a

Zone 5a's last spring frost averages May 10 and first fall frost Oct 1 — about 144 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 Aug 20 for a second harvest before frost.

Common questions

How long does radish take to grow in zone 5a?

Radish matures in about 22–30 days from sowing. In zone 5a that means sowing around Apr 12 and first picking around May 4.

Will radish survive frost in zone 5a?

Yes — radish tolerates light frost. In zone 5a you can sow a little before the last frost (around May 10) and keep harvesting past the first fall frost (around Oct 1).

Can I plant a second crop of radish in zone 5a?

Yes — in zone 5a there's time for a fall sowing around Aug 20 for a second harvest before frost.

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