What Growing Zone Is Michigan In?
USDA hardiness zones
4b to 6b
2023 USDA Plant Hardiness Zone Map
Michigan spans USDA hardiness zone 4b to 6b across its major population centers, according to the 2023 USDA Plant Hardiness Zone Map. That's a real range, not a single number: where you fall in it depends on where in the state you actually are.
Hardiness zone for ZIP 48226 (Detroit)
Your USDA hardiness zone
Zone 6b
Avg. annual minimum (°F)
-5°F to 0°F
Avg. annual minimum (°C)
-21°C to -18°C
Nearest reference point: Detroit, MI
This is a regional estimate based on the nearest of 826 reference points, each matched to the official 2023 USDA zone map. It’s accurate to within about a half-zone across most of the country, but elevation shifts zones over short distances, so if you’re in mountainous terrain, check the official USDA map for your exact address (see Sources below).
Michigan's USDA Hardiness Zones
Here's how the zone shifts across Michigan's major cities:
For your exact zone by ZIP code, use the Hardiness Zone Finder, and for what a zone number actually measures (and doesn't), see how zones actually work.
Frost Dates in Michigan
Frost dates track zone, so they shift across Michigan the same way the zone number does:
- Northern/central Michigan (zone 4): average last frost Apr 23 - May 7, average first frost Sep 23 - Oct 7.
- Detroit metro (zone 6): average last frost Mar 29 - Apr 12, average first frost Oct 18 - Nov 1.
These are averages, not guarantees. For your specific frost window, use the Frost Date Calculator. For a full vegetable-by-vegetable planting calendar already calculated from Michigan's frost dates, see the Michigan Planting Calendar.
The Lake Michigan "fruit belt" along the state's west coast is a real, documented lake-effect microclimate: the lake delays spring blossoming and the first fall frost and moderates summer heat, keeping winter minimums less extreme than at inland sites at the same latitude.
What Grows Well in Michigan's Zones
A few real, zone-appropriate picks recommended by Michigan State University Extension for Michigan landscapes: not an exhaustive list, but a genuine starting point.
- White oak (Quercus alba)
- Bur oak (Quercus macrocarpa)
- Eastern white pine (Pinus strobus)
- Downy serviceberry (juneberry) (Amelanchier arborea)
- Ninebark (Physocarpus opulifolius)
Ready to find your exact zone? Use the Hardiness Zone Finder: enter your ZIP code for a precise match against the 2023 USDA map.
Michigan Growing Zone FAQ
What growing zone is Michigan in?
Michigan spans USDA hardiness zones 4b to 6b on the 2023 USDA Plant Hardiness Zone Map. Saginaw is zone 6a and Lansing is zone 6a; enter your ZIP code in the Hardiness Zone Finder for your exact zone.
What growing zone is Detroit, MI?
Detroit is in USDA hardiness zone 6b on the 2023 USDA map. Zones within a city can differ by half a zone, so check your ZIP code for an exact match.
What growing zone is Grand Rapids, MI?
Grand Rapids is in USDA hardiness zone 6a on the 2023 USDA map. Zones within a city can differ by half a zone, so check your ZIP code for an exact match.
What growing zone is Ann Arbor, MI?
Ann Arbor is in USDA hardiness zone 6a on the 2023 USDA map. Zones within a city can differ by half a zone, so check your ZIP code for an exact match.
What growing zone is Lansing, MI?
Lansing is in USDA hardiness zone 6a on the 2023 USDA map. Zones within a city can differ by half a zone, so check your ZIP code for an exact match.
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The Spacing & Planting Cheat Sheet
When to start, when to plant, how far apart.
Sources & further reading
Zone and city data checked against the official USDA Plant Hardiness Zone Map. Plant recommendations sourced from Michigan State University Extension. Climate note sourced from Michigan State University Department of Geography. For more on how we build and verify reference data across this site, see our methodology page.
Growing zones in nearby states
Gardening near a state line? Zones don't stop at the border:
Or browse all 51 state growing-zone guides.