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Can You Grow Brussels Sprouts in Illinois?

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

Grows well here

Brussels sprouts grow here with a long enough frost-free season — frost actually improves them.

Plant zones

3a–9a

Illinois last frost

early April

Illinois first frost

late October

Days to harvest

90–180 days

When to plant Brussels Sproutses in Illinois

Start indoors

Feb 9

Transplant

Apr 7

Harvest

Jul 6 – Oct 4

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

About Brussels Sprouts

Brussels sprouts have a long season but reward patience — sprouts actually improve after a light frost.

Start indoors 8 weeks before last frost. Plant in the sunniest spot. Needs a long season — start early. Frost improves flavour. Stake in exposed positions against autumn winds.

Full brussels sprouts 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.