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Planting calendar for ZIP 80729 (Grover, CO)

When to plant vegetables in Grover, CO (USDA hardiness zone 5a). Typical last spring frost around May 14, 2026 9 days year to year), first fall frost around Sep 26, 202610 days).

Playing it safe? Spring frost holds off until about May 25, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Grover, CO

February

March

April

May

June

July

August

Understand your frost dates

Frost dates for ZIP 80729: NOAA 1991-2020 normals (USC00481547 CARPENTER 3N, WY US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.