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Can You Grow Tomato in Colorado?

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

Grows well here

Tomatoes grow well here — plant after your last frost date and expect harvest within 60-85 days.

Plant zones

4a–11b

Colorado last frost

early April

Colorado first frost

late October

Days to harvest

60–85 days

When to plant Tomatoes in Colorado

Start indoors

Feb 23

Transplant

Apr 7

Harvest

Jun 6 – Jul 1

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

About Tomato

One of the most popular garden vegetables — thrives in warm weather and full sun with consistent moisture.

Start seeds indoors 6-8 weeks before last frost. Plant deeply — tomatoes root along buried stems. Water consistently to prevent blossom end rot.

Full tomato 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 Tomato in Colorado?

Tomatoes grow well here — plant after your last frost date and expect harvest within 60-85 days.

What zone is Colorado?

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

When do you plant Tomatoes in Colorado?

Plant Tomatoes around early April (start indoors Feb 23), harvest Jun 6 – Jul 1.