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Planting calendar for ZIP 58845 (Grenora, ND)

When to plant vegetables in Grenora, ND (USDA hardiness zone 3b). Typical last spring frost around May 18, 2026 9 days year to year), first fall frost around Sep 21, 20269 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.

See the full Grenora, ND planting calendar for dates typical of the whole city.

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Month by month in Grenora, ND

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 58845: NOAA 1991-2020 normals (USC00248777 WESTBY, MT US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.