When to plant scallion in zone 4a — planting calendar

Growing SeasonZone 4a

Last frost ~May 7First frost ~Oct 13Today

Start indoorsTransplant / sowHarvestFrost risk

APRMAYJUNJULAUG

Sow Apr 16 · First harvest Jun 15 · Wrap by Jul 27

Last spring frostMay 7

Direct sowApr 16

First harvestJun 15

Last harvestJul 27

Fall succession sowAug 18

First fall frostOct 13

Why these dates work in zone 4a

Zone 4a's last spring frost averages May 7 and first fall frost Oct 13 — about 159 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 Aug 18 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 16 and first picking around Jun 15.

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 7) and keep harvesting past the first fall frost (around Oct 13).

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

Yes — in zone 4a there's time for a fall sowing around Aug 18 for a second harvest before frost.

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

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