When to plant dill in zone 4b — planting calendar

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Showing USDA Zone 4B

Growing SeasonZone 4b

Last frost ~May 15First frost ~Sep 25Today

Start indoorsTransplant / sowHarvestFrost risk

APRMAYJUNJULAUG

Sow May 1 · First harvest Jun 10 · Wrap by Aug 5

Last spring frostMay 15

Direct sowMay 1

First harvestJun 10

Last harvestAug 5

Fall succession sowAug 7

First fall frostSep 25

Why these dates work in zone 4b

Zone 4b's last spring frost averages May 15 and first fall frost Sep 25 — about 133 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 7 for a second harvest before frost.

Common questions

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

Dill matures in about 40–55 days from sowing. In zone 4b that means sowing around May 1 and first picking around Jun 10.

Will dill survive frost in zone 4b?

Yes — dill tolerates light frost. In zone 4b you can sow a little before the last frost (around May 15) and keep harvesting past the first fall frost (around Sep 25).

Can I plant a second crop of dill in zone 4b?

Yes — in zone 4b there's time for a fall sowing around Aug 7 for a second harvest before frost.

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