When to plant dill 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 May 6 · First harvest Jun 15 · Wrap by Aug 10

Last spring frostMay 20

Direct sowMay 6

First harvestJun 15

Last harvestAug 10

Fall succession sowAug 2

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. Dill 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 2 for a second harvest before frost.

Common questions

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

Dill matures in about 40–55 days from sowing. In zone 4a that means sowing around May 6 and first picking around Jun 15.

Will dill survive frost in zone 4a?

Yes — dill 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 dill in zone 4a?

Yes — in zone 4a there's time for a fall sowing around Aug 2 for a second harvest before frost.

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