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Can You Grow Butternut Squash in Alberta?

Canada · Canadian Zone 4 · zones 2, 3, 4, 5

Grows well here

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

Plant zones

3a–10b

Alberta last frost

early May

Alberta first frost

early October

Days to harvest

100–120 days

When to plant Butternut Squashes in Alberta

Start indoors

Apr 3

Transplant

May 1

Harvest

Aug 9 – Aug 29

Dates are approximate, based on Alberta'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 Alberta

Alberta has a dry continental climate with cold winters and warm summers. Calgary and Edmonton are Zone 4-5. Intense sunshine compensates for the short season. Chinook winds bring warm spells in winter.