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Can You Grow Sunflower in Delaware?

US · USDA Zone 7a · zones 6b, 7a

Grows well here

Sunflowers grow brilliantly here — they love the warm season and produce quickly.

Plant zones

2a–11b

Delaware last frost

early March

Delaware first frost

late November

Days to harvest

60–80 days

When to plant Sunflowers in Delaware

Direct sow

Mar 7

Harvest

May 6 – May 26

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

About Sunflower

Sunflowers are fast-growing cheerful and attract pollinators — some varieties produce edible seeds.

Direct sow after last frost in the sunniest spot available. No transplanting needed. Giant varieties need staking. Harvest seed heads when the back turns brown and seeds are firm.

Full sunflower 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.