When to Plant Garlic in Colorado

In a typical Colorado location, plant in fall Sep 10 – Sep 24. Across the state, the fall planting window starts as early as Aug 10 in Edwards and as late as Sep 25 in Grand Junction.

Method Direct sow

Days to maturity 240–270 days

Fall-planted crop only; not planted in spring in most climates.

Garlic Planting Dates by City

City	Fall planting
Denver	Sep 14 – Sep 28
Colorado Springs	Sep 10 – Sep 24
Aurora	Sep 10 – Sep 24
Fort Collins	Sep 9 – Sep 23
Lakewood	Sep 9 – Sep 23
Thornton	Sep 13 – Sep 27
Westminster	Sep 13 – Sep 27
Arvada	Sep 7 – Sep 21
Centennial	Sep 10 – Sep 24
Pueblo	Sep 11 – Sep 25
Greeley	Sep 10 – Sep 24
Boulder	Sep 7 – Sep 21
Highlands Ranch	Sep 10 – Sep 24
Longmont	Sep 7 – Sep 21
Loveland	Sep 3 – Sep 17
Broomfield	Sep 13 – Sep 27
Grand Junction	Sep 25 – Oct 9
Castle Rock	Sep 4 – Sep 18
Commerce City	Sep 10 – Sep 24
Parker	Sep 5 – Sep 19
Littleton	Sep 13 – Sep 27
Northglenn	Sep 13 – Sep 27
Brighton	Sep 9 – Sep 23
Dakota Ridge	Sep 13 – Sep 27
Englewood	Sep 13 – Sep 27
Security-Widefield	Sep 10 – Sep 24
Windsor	Sep 8 – Sep 22
Ken Caryl	Sep 13 – Sep 27
Wheat Ridge	Sep 7 – Sep 21
Pueblo West	Sep 15 – Sep 29

Showing the 30 most populous of 65 Colorado cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Colorado cities.

Frequently Asked Questions

When should I plant garlic in Colorado?

In a typical Colorado location, plant in fall Sep 10 – Sep 24. Across the state, the fall planting window starts as early as Aug 10 in Edwards and as late as Sep 25 in Grand Junction.

When is the last frost in Colorado?

The average last spring frost in Colorado ranges from April 14 in Grand Junction to June 21 in Edwards, based on NOAA 1991–2020 climate normals.

How long do garlic take to grow?

Garlic typically take 240–270 days from planting to harvest. Fall-planted crop only; not planted in spring in most climates.

Other Crops in Colorado

When to plant garlic in other states