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Shawmut, MT planting calendar

When to plant vegetables in Shawmut, MT (USDA hardiness zone 4b). Typical last spring frost around May 26, 2026 13 days year to year), first fall frost around Sep 18, 202612 days).

Playing it safe? Spring frost holds off until about Jun 11, 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:

Or get a printable Shawmut calendar and sowing reminders by email:

Still time to plant

As of today, these crops can still reach harvest before Shawmut, MT’s first frost (~Sep 18, 2026) — fastest first.

Month by month in Shawmut, MT

February

March

April

May

June

July

Understand your frost dates

More Montana planting calendars

ZIP codes in Shawmut

59078

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