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Can You Grow Broccoli in Illinois?

US · USDA Zone 5b · zones 4a, 4b, 5a, 5b, 6a

Grows well here

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

Plant zones

2a–9b

Illinois last frost

early April

Illinois first frost

late October

Days to harvest

60–80 days

When to plant Broccolis in Illinois

Start indoors

Feb 23

Transplant

Apr 7

Harvest

Jun 6 – Jun 26

Dates are approximate, based on Illinois'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 Illinois

Illinois has a humid continental climate with hot summers and cold winters. Chicago is Zone 5b-6a; southern Illinois is warmer at Zone 6-7. Classic Midwest growing region.