When to plant scallion in zone 4a — planting calendar

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Showing USDA Zone 4A

Growing SeasonZone 4a

Last frost ~May 20First frost ~Sep 20Today

Start indoorsTransplant / sowHarvestFrost risk

APRMAYJUNJULAUG

Sow Apr 29 · First harvest Jun 28 · Wrap by Aug 9

Last spring frostMay 20

Direct sowApr 29

First harvestJun 28

Last harvestAug 9

Fall succession sowJul 26

First fall frostSep 20

Why these dates work in zone 4a

Zone 4a's last spring frost averages May 20 and first fall frost Sep 20 — about 123 frost-free days. Scallion 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 26 for a second harvest before frost.

Common questions

How long does scallion take to grow in zone 4a?

Scallion matures in about 60–70 days from sowing. In zone 4a that means sowing around Apr 29 and first picking around Jun 28.

Will scallion survive frost in zone 4a?

Yes — scallion tolerates light frost. In zone 4a you can sow a little before the last frost (around May 20) and keep harvesting past the first fall frost (around Sep 20).

Can I plant a second crop of scallion in zone 4a?

Yes — in zone 4a there's time for a fall sowing around Jul 26 for a second harvest before frost.

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