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Can You Grow Winter Squash in Hawaii?
US · USDA Zone 12b · zones 9b, 10a, 10b, 11a, 11b, 12a, 12b
Winter squash needs 90+ warm frost-free days to mature fully — too short a season leaves fruit immature.
Plant zones
Hawaii last frost
Hawaii first frost
Days to harvest
When to plant Winter Squashes in Hawaii
Start indoors
Transplant
Harvest
Dates are approximate, based on Hawaii'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.
Gardening in Hawaii
Hawaii is tropical with year-round warmth. Zone varies dramatically by elevation — coastal areas are Zone 11-12 while Mauna Kea slopes reach Zone 9. Year-round growing throughout.
Frequently asked questions
Can you grow Winter Squash in Hawaii?
Winter squash needs 90+ warm frost-free days to mature fully — too short a season leaves fruit immature.
What zone is Hawaii?
Hawaii spans USDA Zone 12b (9b, 10a, 10b, 11a, 11b, 12a, 12b).
When do you plant Winter Squashes in Hawaii?
Plant Winter Squashes around no frost (start indoors Jan 1), harvest Apr 1 – May 1.