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Alberton, MT planting calendar

When to plant vegetables in Alberton, MT (USDA hardiness zone 5b). Typical last spring frost around May 18, 2026 13 days year to year), first fall frost around Sep 25, 202611 days).

Playing it safe? Spring frost holds off until about Jun 3, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

Want exact dates for your address, a drag-and-drop bed layout, and reminders when it’s time to sow? Enter your ZIP:

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Still time to plant

As of today, these crops can still reach harvest before Alberton, MT’s first frost (~Sep 25, 2026) — fastest first.

Month by month in Alberton, MT

February

March

April

May

June

July

Understand your frost dates

More Montana planting calendars

ZIP codes in Alberton

59820

Frost dates are NOAA 1991–2020 climate normals for a representative location in Alberton, MT (covering 1 ZIP); your exact dates depend on your address. Schedules are guidance, not guarantees.