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Planting calendar for ZIP 81243 (Powderhorn, CO)

When to plant vegetables in Powderhorn, CO (USDA hardiness zone 5b). Typical last spring frost around Jun 9, 2026 11 days year to year), first fall frost around Sep 16, 20269 days).

Playing it safe? Spring frost holds off until about Jun 23, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Powderhorn, CO

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May

June

July

Understand your frost dates

Frost dates for ZIP 81243: NOAA 1991-2020 normals (USC00050797 BLUE MESA LAKE, CO US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.