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Planting calendar for ZIP 59750 (Butte, MT)

When to plant vegetables in Butte, MT (USDA hardiness zone 5a). Typical last spring frost around Jun 13, 2026 14 days year to year), first fall frost around Sep 5, 202610 days).

Playing it safe? Spring frost holds off until about Jun 30, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Butte, MT planting calendar for dates typical of the whole city.

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Month by month in Butte, MT

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 59750: NOAA 1991-2020 normals (USW00024135 BUTTE BERT MOONEY AP, MT US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.