Frost dates across Michigan
Typical last spring frost, first fall frost, and USDA zone for 5 Michigan cities, from 30-year NOAA climate normals. Every date is a 50 percent odds line, not a promise. Pick a city for the full frost window and what is plantable there now.
| City | Last spring frost | First fall frost | Season length | Zone |
|---|---|---|---|---|
| Detroit | Apr 27 | Oct 25 | about 181 days | 6b |
| Grand Rapids | May 6 | Oct 10 | about 157 days | 6a |
| Warren | Apr 21 | Oct 31 | about 193 days | 6b |
| Sterling Heights | Apr 21 | Oct 31 | about 193 days | 6b |
| Ann Arbor | May 8 | Oct 4 | about 149 days | 6a |
Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.
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