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Planting calendar for ZIP 48708 (Bay City, MI)

When to plant vegetables in Bay City, MI (USDA hardiness zone 6a). Typical last spring frost around Apr 27, 2026 10 days year to year), first fall frost around Oct 20, 202611 days).

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

See the full Bay City, MI planting calendar for dates typical of the whole city.

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Month by month in Bay City, MI

January

February

March

April

May

August

Understand your frost dates

Frost dates for ZIP 48708: NOAA 1991-2020 normals (USC00202631 ESSEXVILLE, MI US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.