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Can You Grow Broccoli in Iowa?

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

Grows well here

Broccoli grows well here as a spring or fall crop — time planting to avoid peak summer heat.

Plant zones

2a–9b

Iowa last frost

mid-April

Iowa first frost

mid-October

Days to harvest

60–80 days

When to plant Broccolis in Iowa

Start indoors

Mar 3

Transplant

Apr 15

Harvest

Jun 14 – Jul 4

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

About Broccoli

Broccoli is a cool-season crop that produces best in spring and fall when temperatures are moderate.

Start indoors 6-8 weeks before last frost for spring planting or direct sow in midsummer for fall. Harvest the main head before it flowers — side shoots continue producing after.

Full broccoli 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.