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Can You Grow Butternut Squash in Washington?
US · USDA Zone 8b · zones 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b
Butternut squash thrives here with warm, frost-free summers and full sun.
Plant zones
Washington last frost
Washington first frost
Days to harvest
When to plant Butternut Squashes in Washington
Start indoors
Transplant
Harvest
Dates are approximate, based on Washington'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.
Gardening in Washington
Washington has dramatically different climates. The wet maritime west (Zone 8a-8b) is mild and productive year-round. Eastern Washington is semi-arid and colder (Zone 5-6) with hot dry summers.
Frequently asked questions
Can you grow Butternut Squash in Washington?
Butternut squash thrives here with warm, frost-free summers and full sun.
What zone is Washington?
Washington spans USDA Zone 8b (4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b).
When do you plant Butternut Squashes in Washington?
Plant Butternut Squashes around late January (start indoors Jan 2), harvest May 10 – May 30.