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Can You Grow Butternut Squash in New Hampshire?

US · USDA Zone 5b · zones 4a, 4b, 5a, 5b, 6a

Grows well here

Butternut squash thrives here with warm, frost-free summers and full sun.

Plant zones

3a–10b

New Hampshire last frost

early April

New Hampshire first frost

late October

Days to harvest

100–120 days

When to plant Butternut Squashes in New Hampshire

Start indoors

Mar 10

Transplant

Apr 7

Harvest

Jul 16 – Aug 5

Dates are approximate, based on New Hampshire's average frost dates. Your exact yard may vary by microclimate.

About Butternut Squash

Butternut squash is the most popular winter squash — sweet, smooth, and superb for storage. A vigorous vining plant that needs warm weather and room to sprawl.

Direct sow after last frost or start indoors 3-4 weeks earlier. Harvest when skin turns tan and hard. Cure 1-2 weeks in a warm spot before storing in a cool dry place.

Full butternut squash growing guide →

Gardening in New Hampshire

New Hampshire has a humid continental climate. Coastal areas are Zone 5b-6a; northern mountains are Zone 4a-5a. Short growing seasons but productive for cool-season crops and berries.

See what grows well in New Hampshire →

Frequently asked questions

Can you grow Butternut Squash in New Hampshire?

Butternut squash thrives here with warm, frost-free summers and full sun.

What zone is New Hampshire?

New Hampshire spans USDA Zone 5b (4a, 4b, 5a, 5b, 6a).

When do you plant Butternut Squashes in New Hampshire?

Plant Butternut Squashes around early April (start indoors Mar 10), harvest Jul 16 – Aug 5.