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Can You Grow Onion in Kansas?

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

Grows well here

Onions grow well here — plant sets or transplants in early spring for a summer harvest.

Plant zones

2a–9b

Kansas last frost

early April

Kansas first frost

late October

Days to harvest

90–120 days

When to plant Onions in Kansas

Start indoors

Feb 3

Transplant

Apr 1

Harvest

Jun 30 – Jul 30

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

About Onion

Onions are a staple crop that stores well and can be grown as sets transplants or from seed.

Growing from sets is easiest for beginners. Plant in early spring — onions are frost-tolerant. Day-length sensitive — choose short-day long-day or day-neutral varieties based on your latitude.

Full onion growing guide →

Gardening in Kansas

Kansas spans from Zone 5a in the northwest to Zone 6b in the southeast. Hot summers and cold winters define the climate. Excellent for wheat, sunflowers, and warm-season vegetables.