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Can You Grow Sweet Potato in Wisconsin?

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

Grows well here

Sweet potatoes grow well here — they love the warm season your zone provides.

Plant zones

5a–11b

Wisconsin last frost

mid-April

Wisconsin first frost

mid-October

Days to harvest

90–120 days

When to plant Sweet Potatoes in Wisconsin

Direct sow

Apr 15

Harvest

Jul 14 – Aug 13

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

About Sweet Potato

Sweet potatoes need a long warm season and thrive in heat — they are a subtropical crop at heart.

Plant slips (rooted cuttings) after soil warms to 18°C. They sprawl — give them space or train vertically. Cure harvested tubers at 30°C for a week to develop sweetness and improve storage.

Full sweet potato 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.