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Can You Grow Butternut Squash in South Dakota?

US · USDA Zone 4b · zones 3b, 4a, 4b, 5a, 5b

Grows well here

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

Plant zones

3a–10b

South Dakota last frost

mid-April

South Dakota first frost

mid-October

Days to harvest

100–120 days

When to plant Butternut Squashes in South Dakota

Start indoors

Mar 18

Transplant

Apr 15

Harvest

Jul 24 – Aug 13

Dates are approximate, based on South Dakota'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 South Dakota

South Dakota has a continental climate with cold winters and warm summers. Eastern South Dakota is Zone 4b-5a; western South Dakota is colder. Short growing seasons.

See what grows well in South Dakota →

Frequently asked questions

Can you grow Butternut Squash in South Dakota?

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

What zone is South Dakota?

South Dakota spans USDA Zone 4b (3b, 4a, 4b, 5a, 5b).

When do you plant Butternut Squashes in South Dakota?

Plant Butternut Squashes around mid-April (start indoors Mar 18), harvest Jul 24 – Aug 13.