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Can You Grow Corn in Washington?

US · USDA Zone 8b · zones 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b

Grows well here

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

Plant zones

3b–11b

Washington last frost

late January

Washington first frost

mid-December

Days to harvest

60–90 days

When to plant Corn in Washington

Direct sow

Jan 30

Harvest

Mar 31 – Apr 30

Dates are approximate, based on Washington'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 Washington

Washington has dramatically different climates. The wet maritime west (Zone 8a-8b) is mild and productive year-round. Eastern Washington is semi-arid and colder (Zone 5-6) with hot dry summers.

See what grows well in Washington →

Frequently asked questions

Can you grow Corn in Washington?

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

What zone is Washington?

Washington spans USDA Zone 8b (4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b).

When do you plant Corn in Washington?

Plant Corn Jan 30, harvest Mar 31 – Apr 30.