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Ontonagon, MI planting calendar

When to plant vegetables in Ontonagon, MI (USDA hardiness zone 5a). Typical last spring frost around May 27, 2026 14 days year to year), first fall frost around Oct 1, 202613 days).

Playing it safe? Spring frost holds off until about Jun 13, 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:

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Still time to plant

As of today, these crops can still reach harvest before Ontonagon, MI’s first frost (~Oct 1, 2026) — fastest first.

Month by month in Ontonagon, MI

February

March

April

May

June

July

August

Understand your frost dates

More Michigan planting calendars

ZIP codes in Ontonagon

49953

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