Skip to main content

Planting calendar for ZIP 59072 (Roundup, MT)

When to plant vegetables in Roundup, MT (USDA hardiness zone 4b). Typical last spring frost around May 20, 2026 11 days year to year), first fall frost around Sep 21, 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.

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

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 ZIP 59072 calendar and sowing reminders by email:

Month by month in Roundup, MT

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 59072: NOAA 1991-2020 normals (USC00247214 ROUNDUP, MT US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.