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Planting calendar for ZIP 81120 (Antonito, CO)

When to plant vegetables in Antonito, CO (USDA hardiness zone 5b). Typical last spring frost around May 28, 2026 11 days year to year), first fall frost around Sep 21, 20269 days).

Playing it safe? Spring frost holds off until about Jun 11, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Antonito, CO

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 81120: NOAA 1991-2020 normals (USC00055322 MANASSA, CO US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.