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Planting calendar for ZIP 59833 (Florence, MT)

When to plant vegetables in Florence, MT (USDA hardiness zone 5b). Typical last spring frost around May 22, 2026 14 days year to year), first fall frost around Sep 19, 202611 days).

Playing it safe? Spring frost holds off until about Jun 8, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Florence, MT

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 59833: NOAA 1991-2020 normals (USC00247894 STEVENSVILLE, MT US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.