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Can You Grow Corn in Colorado?

US · USDA Zone 5b · zones 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b

Grows well here

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

Plant zones

3b–11b

Colorado last frost

early April

Colorado first frost

late October

Days to harvest

60–90 days

When to plant Corn in Colorado

Direct sow

Apr 7

Harvest

Jun 6 – Jul 6

Dates are approximate, based on Colorado'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 Colorado

Colorado has a semi-arid mountain climate with intense sunshine and low humidity. Front Range cities like Denver are Zone 5-6; higher elevations are Zones 3-4.