Skip to main content

Plains, MT planting calendar

When to plant vegetables in Plains, MT (USDA hardiness zone 6a). Typical last spring frost around May 17, 2026 15 days year to year), first fall frost around Sep 23, 202612 days).

Playing it safe? Spring frost holds off until about Jun 5, 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 Plains calendar and sowing reminders by email:

Still time to plant

As of today, these crops can still reach harvest before Plains, MT’s first frost (~Sep 23, 2026) — fastest first.

Month by month in Plains, MT

February

March

April

May

June

July

Understand your frost dates

More Montana planting calendars

ZIP codes in Plains

59859

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