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Can You Grow Winter Squash in New Hampshire?

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

Grows well here

Winter squash grows well here with warm summers — it needs heat to mature and set fruit.

Plant zones

3a–10b

New Hampshire last frost

early April

New Hampshire first frost

late October

Days to harvest

90–120 days

When to plant Winter Squashes in New Hampshire

Start indoors

Mar 10

Transplant

Apr 7

Harvest

Jul 6 – Aug 5

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

About Winter Squash

Winter squash (butternut, acorn, spaghetti) are the long-storing hard-skinned squash you plant in spring and harvest in fall. Vigorous, sprawling, and highly productive.

Direct sow or start indoors 4 weeks before last frost; transplant after frost. Give vines room (6-8 ft) or a trellis. Harvest when skin is hard and you can't dent it with a fingernail. Cure in a warm place for 1-2 weeks for long storage.

Full winter 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.