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When to plant winter squash in Zone 5b

In Zone 5b, direct-sow or transplant around May 11 – May 25.

Your winter squash timeline — Zone 5b

Start indoorsApril 20 – April 27
TransplantMay 11 – May 25
Zone 5b last frost~05/04
Zone 5b first frost~10/08
Direct-sow or set out 2 weeks after the last frost. [src]Cited: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”

Dates computed from Zone 5b's median NOAA frost normals and the cited rule. Your town may differ by a week or two — check your exact ZIP.

What you'll need

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Last verified 2026-07-16. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rule: University of New Hampshire Cooperative Extension — “Growing Vegetables: When to Plant Your Vegetable Garden”; UGA Extension (days to maturity).

Winter Squash in other zones

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