When to plant cauliflower in zone 6b — planting calendar

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Showing USDA Zone 6B

Growing SeasonZone 6b

Last frost ~Apr 20First frost ~Oct 15Today

Start indoorsTransplant / sowHarvestFrost risk

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Start indoors Mar 9 · Transplant Mar 30 · First harvest Jun 8 · Wrap by Jun 29

Last spring frostApr 20

Start seeds indoorsMar 9

Transplant outMar 30

First harvestJun 8

Last harvestJun 29

Fall succession sowJul 9

First fall frostOct 15

Why these dates work in zone 6b

Zone 6b's last spring frost averages Apr 20 and first fall frost Oct 15 — about 178 frost-free days. Cauliflower tolerates light frost, so you can set plants out ahead of the last-frost date and keep harvesting into the cooler fall. Starting seeds indoors 6 weeks ahead gives strong transplants ready the moment the soil warms. There's also room for a fall succession sowing around Jul 9 for a second harvest before frost.

Common questions

How long does cauliflower take to grow in zone 6b?

Cauliflower matures in about 70–100 days from transplanting. In zone 6b that means setting plants out around Mar 30 and first picking around Jun 8.

Will cauliflower survive frost in zone 6b?

Yes — cauliflower tolerates light frost. In zone 6b you can set plants out a little before the last frost (around Apr 20) and keep harvesting past the first fall frost (around Oct 15).

Can I plant a second crop of cauliflower in zone 6b?

Yes — in zone 6b there's time for a fall sowing around Jul 9 for a second harvest before frost.

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