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Can You Grow Corn in Illinois?

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

Grows well here

Corn grows well here — plant in blocks after last frost for a summer harvest.

Plant zones

3b–11b

Illinois last frost

early April

Illinois first frost

late October

Days to harvest

60–90 days

When to plant Corn in Illinois

Direct sow

Apr 7

Harvest

Jun 6 – Jul 6

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

About Corn

Corn needs space warmth and wind-pollination — plant in blocks not rows for good pollination.

Direct sow after soil reaches 16°C. Plant in a 4x4 block minimum for wind pollination. Needs consistent water especially during tasselling. Not suitable for containers.

Full corn 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.