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Can You Grow Watermelon in Wisconsin?

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

Grows well here

Watermelons thrive here — they love the long warm season your zone provides.

Plant zones

4b–11b

Wisconsin last frost

mid-April

Wisconsin first frost

mid-October

Days to harvest

70–90 days

When to plant Watermelons in Wisconsin

Start indoors

Mar 18

Transplant

Apr 15

Harvest

Jun 24 – Jul 14

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

About Watermelon

Watermelons love heat space and sun — they are a rewarding crop but need a long warm season.

Start indoors 4 weeks before last frost. Transplant carefully — watermelons hate root disturbance. Give them maximum space. Use black plastic mulch to warm soil. Choose icebox varieties for containers.

Full watermelon growing guide →

Gardening in Wisconsin

Wisconsin has a cold humid continental climate. Milwaukee is Zone 5b-6a; northern Wisconsin is Zone 4a-5a. Cold winters but warm productive summers. Known for dairy farming and cold-hardy crops.

See what grows well in Wisconsin →

Frequently asked questions

Can you grow Watermelon in Wisconsin?

Watermelons thrive here — they love the long warm season your zone provides.

What zone is Wisconsin?

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

When do you plant Watermelons in Wisconsin?

Plant Watermelons around mid-April (start indoors Mar 18), harvest Jun 24 – Jul 14.