Skip to main content

Planting calendar for ZIP 80521 (Fort Collins, CO)

When to plant vegetables in Fort Collins, CO (USDA hardiness zone 5b). Typical last spring frost around May 2, 2026 10 days year to year), first fall frost around Oct 7, 202610 days).

Playing it safe? Spring frost holds off until about May 14, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Fort Collins, CO planting calendar for dates typical of the whole city.

Want exact dates for your address, a drag-and-drop bed layout, and reminders when it’s time to sow? Enter your ZIP:

Or get a printable ZIP 80521 calendar and sowing reminders by email:

Month by month in Fort Collins, CO

January

February

March

April

May

July

August

Understand your frost dates

Frost dates for ZIP 80521: NOAA 1991-2020 normals (USC00053005 FT COLLINS, CO US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.