When to plant spinach in zone 5b — planting calendar

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Showing USDA Zone 5B

Growing SeasonZone 5b

Last frost ~May 15First frost ~Sep 30Today

Start indoorsTransplant / sowHarvestFrost risk

APRMAYJUNJUL

Sow Apr 17 · First harvest May 24 · Wrap by Jun 21

Last spring frostMay 15

Direct sowApr 17

First harvestMay 24

Last harvestJun 21

Fall succession sowAug 5

First fall frostSep 30

Why these dates work in zone 5b

Zone 5b's last spring frost averages May 15 and first fall frost Sep 30 — about 138 frost-free days. Spinach 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 5 for a second harvest before frost.

Common questions

How long does spinach take to grow in zone 5b?

Spinach matures in about 37–50 days from sowing. In zone 5b that means sowing around Apr 17 and first picking around May 24.

Will spinach survive frost in zone 5b?

Yes — spinach tolerates light frost. In zone 5b you can sow a little before the last frost (around May 15) and keep harvesting past the first fall frost (around Sep 30).

Can I plant a second crop of spinach in zone 5b?

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

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