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Planting calendar for ZIP 80804 (Arriba, CO)

When to plant vegetables in Arriba, CO (USDA hardiness zone 5b). Typical last spring frost around May 5, 2026 11 days year to year), first fall frost around Oct 8, 20268 days).

Playing it safe? Spring frost holds off until about May 19, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Arriba, CO

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August

Understand your frost dates

Frost dates for ZIP 80804: NOAA 1991-2020 normals (USC00052932 FLAGLER 1S, CO US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.