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Can You Grow Scallion in Colorado?

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

Grows well here

Scallions grow well here year-round in most zones — they're cold-hardy and fast.

Plant zones

2a–11b

Colorado last frost

early April

Colorado first frost

late October

Days to harvest

25–45 days

When to plant Scallions in Colorado

Direct sow

Apr 7

Harvest

May 2 – May 22

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

About Scallion

Scallions (green onions) are the fastest, easiest crop in any garden — sow a pinch and cut fresh in as little as three weeks. Grows in almost any sunny spot or container.

Direct sow thickly and thin as you harvest, or regrow from kitchen scraps in a glass of water. Succession-plant every 2-3 weeks for a continuous supply.

Full scallion 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.