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Can You Grow Pumpkin in Colorado?

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

Grows well here

Pumpkins grow well here — they love the warm season and produce reliably with enough space.

Plant zones

3b–11b

Colorado last frost

early April

Colorado first frost

late October

Days to harvest

75–100 days

When to plant Pumpkins in Colorado

Start indoors

Mar 17

Transplant

Apr 7

Harvest

Jun 21 – Jul 16

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

About Pumpkin

Pumpkins need space warmth and sun — allow 2-4 square metres per plant for sprawling vines.

Direct sow or start indoors 3 weeks before last frost. Give each plant 2-4 sq metres. Water at the base to prevent fungal disease. Harvest when the skin is hard and the stem dries.

Full pumpkin 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.

See what grows well in Colorado →

Frequently asked questions

Can you grow Pumpkin in Colorado?

Pumpkins grow well here — they love the warm season and produce reliably with enough space.

What zone is Colorado?

Colorado spans USDA Zone 5b (3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b).

When do you plant Pumpkins in Colorado?

Plant Pumpkins around early April (start indoors Mar 17), harvest Jun 21 – Jul 16.