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Can You Grow Onion in Delaware?

US · USDA Zone 7a · zones 6b, 7a

Grows well here

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

Plant zones

2a–9b

Delaware last frost

early March

Delaware first frost

late November

Days to harvest

90–120 days

When to plant Onions in Delaware

Start indoors

Jan 10

Transplant

Mar 7

Harvest

Jun 5 – Jul 5

Dates are approximate, based on Delaware'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 Delaware

Delaware has a humid subtropical climate moderated by the Atlantic. Mild winters and warm summers support a long growing season for mid-Atlantic vegetables.

See what grows well in Delaware →

Frequently asked questions

Can you grow Onion in Delaware?

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

What zone is Delaware?

Delaware spans USDA Zone 7a (6b, 7a).

When do you plant Onions in Delaware?

Plant Onions around early March (start indoors Jan 10), harvest Jun 5 – Jul 5.