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Can You Grow Pumpkin in Iowa?

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

Grows well here

Pumpkins grow well here — they love the warm season and produce reliably with enough space.

Plant zones

3b–11b

Iowa last frost

mid-April

Iowa first frost

mid-October

Days to harvest

75–100 days

When to plant Pumpkins in Iowa

Start indoors

Mar 25

Transplant

Apr 15

Harvest

Jun 29 – Jul 24

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

About Pumpkin

Pumpkins need space warmth and sun — allow 2-4 square metres per plant for sprawling vines.

Direct sow or start indoors 3 weeks before last frost. Give each plant 2-4 sq metres. Water at the base to prevent fungal disease. Harvest when the skin is hard and the stem dries.

Full pumpkin growing guide →

Gardening in Iowa

Iowa has a humid continental climate with cold winters and warm summers. Most of the state is Zone 5a-5b. Excellent for cool-season crops and hardy fruits.