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Fairfield, MT planting calendar

When to plant vegetables in Fairfield, MT (USDA hardiness zone 4b). Typical last spring frost around May 13, 2026 13 days year to year), first fall frost around Sep 27, 202610 days).

Playing it safe? Spring frost holds off until about May 29, 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 Fairfield calendar and sowing reminders by email:

Still time to plant

As of today, these crops can still reach harvest before Fairfield, MT’s first frost (~Sep 27, 2026) — fastest first.

Month by month in Fairfield, MT

February

March

April

May

June

July

August

Understand your frost dates

More Montana planting calendars

ZIP codes in Fairfield

59436

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