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Planting calendar for ZIP 59722 (Deer Lodge, MT)

When to plant vegetables in Deer Lodge, MT (USDA hardiness zone 4b). Typical last spring frost around Jun 9, 2026 13 days year to year), first fall frost around Sep 8, 202610 days).

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

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

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Month by month in Deer Lodge, MT

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 59722: NOAA 1991-2020 normals (USC00242738 ELLISTON, MT US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.