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Planting calendar for ZIP 59006 (Ballantine, MT)

When to plant vegetables in Ballantine, MT (USDA hardiness zone 4b). Typical last spring frost around May 12, 2026 10 days year to year), first fall frost around Sep 25, 202610 days).

Playing it safe? Spring frost holds off until about May 24, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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

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Month by month in Ballantine, MT

February

March

April

May

June

July

August

Understand your frost dates

Frost dates for ZIP 59006: NOAA 1991-2020 normals (USC00244345 HUNTLEY EXP STN, MT US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.