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Planting calendar for ZIP 55726 (Cromwell, MN)

When to plant vegetables in Cromwell, MN (USDA hardiness zone 4a). Typical last spring frost around May 31, 2026 14 days year to year), first fall frost around Sep 18, 202612 days).

Playing it safe? Spring frost holds off until about Jun 17, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

See the full Cromwell, MN planting calendar for dates typical of the whole city.

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Month by month in Cromwell, MN

February

March

April

May

June

July

Understand your frost dates

Frost dates for ZIP 55726: NOAA 1991-2020 normals (USC00219173 WRIGHT 3 E, MN US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.