When to plant zucchini in zone 6a — planting calendar

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Showing USDA Zone 6A

Growing SeasonZone 6a

Last frost ~Apr 30First frost ~Oct 10Today

Start indoorsTransplant / sowHarvestFrost risk

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Start indoors Apr 9 · Sow May 7 · First harvest Jun 21 · Wrap by Aug 30

Last spring frostApr 30

Start seeds indoorsApr 9

Direct sowMay 7

First harvestJun 21

Last harvestAug 30

First fall frostOct 10

Why these dates work in zone 6a

Zone 6a's last spring frost averages Apr 30 and first fall frost Oct 10 — about 163 frost-free days. Zucchini is frost-sensitive, so the 1w after frost timing builds in a safety margin against a late cold snap — setting plants out too early risks losing them to frost. Starting seeds indoors 3 weeks ahead gives strong transplants ready the moment the soil warms.

Common questions

How long does zucchini take to grow in zone 6a?

Zucchini matures in about 45–60 days from sowing. In zone 6a that means sowing around May 7 and first picking around Jun 21.

Will zucchini survive frost in zone 6a?

No — zucchini is frost-sensitive. In zone 6a, wait until after the last frost (around Apr 30) to plant, and harvest before the first fall frost (around Oct 10).

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