USDA hardiness zones — 2023 map
Michigan hardiness zones — USDA planting zone map + what to grow
Zones 4a-6b · most of Michigan is zone 6a · Midwest region
MichiganUSDA zone range & map
On the 2023 USDA Plant Hardiness Zone Map, Michigan spans zones 4a-6b. The map shades the state from the western Upper Peninsula interior (zone 4a) through to the southeast near Detroit and the Lake Michigan fruit belt (zone 6b). The single most common half-zone across the populated state is zone 6a — that is the figure to use if you only remember one number for Michigan. Michigan is moderated by the Great Lakes, which create a milder fruit belt along Lake Michigan and a colder interior Upper Peninsula.
| USDA zone range | Zones 4a-6b |
|---|---|
| Most common zone | Zone 6a |
| Coldest area | the western Upper Peninsula interior (zone 4a) |
| Warmest area | the southeast near Detroit and the Lake Michigan fruit belt (zone 6b) |
| Average last spring frost | mid-May |
| Average first fall frost | early October |
Source: USDA 2023 Plant Hardiness Zone Map (1991-2020 normals). Frost averages: NOAA/NCEI 1991-2020 climate normals. Local ZIP-level zones and frost dates can differ from these statewide figures.
Michigan hardiness zones by major city
Zones shift across Michigan with elevation and distance from the coast. Here is the 2023 USDA half-zone for the largest cities:
| City | USDA zone |
|---|---|
| Detroit | Zone 6b |
| Grand Rapids | Zone 6a |
| Lansing | Zone 5b |
| Marquette | Zone 5a |
| Traverse City | Zone 6a |
Need your exact zone? Run the ZIP-code zone finder for a precise half-zone and frost dates for your address.
ZIP-code zones in Michigan
Statewide ranges hide a lot. Tap your area for its exact USDA half-zone, last and first frost dates, and what to plant now:
- Southfield 48075 — Zone 6a
- Warren 48089 — Zone 6a
- Ann Arbor 48104 — Zone 6a
- Livonia 48150 — Zone 6a
- Northville 48168 — Zone 6a
- Detroit 48201 — Zone 6b
- Detroit (East) 48205 — Zone 6a
- Detroit (Downtown) 48226 — Zone 6b
- Auburn Hills 48326 — Zone 6a
- Flint 48506 — Zone 6a
- Saginaw 48602 — Zone 6a
- Bay City 48708 — Zone 6a
- Lansing (South) 48911 — Zone 6a
- Lansing 48933 — Zone 6a
- Kalamazoo 49001 — Zone 6a
- Battle Creek 49017 — Zone 6a
- Muskegon 49441 — Zone 6b
- Grand Rapids 49503 — Zone 6a
- Traverse City 49684 — Zone 6a
- Marquette 49855 — Zone 5a
What Michigan's zone range means for planting
Your hardiness zone tells you which perennials, shrubs, and trees will survive a typical Michigan winter, and it anchors when tender crops can go outside. Because Michigan spans 4a-6b, two gardeners in the same state can have very different planting calendars.
- Pick perennials hardy to your local zone. Across most of Michigan that means at least zone 6a; gardeners in the western Upper Peninsula interior (zone 4a) should choose hardier plants.
- Anchor tender crops to your frost dates. With a last spring frost around mid-May and first fall frost around early October, set out tomatoes, peppers, and basil after the last frost and protect them before the first.
- Adjust for your microclimate. Urban heat, a south-facing slope, or a cold valley pocket can shift your effective zone and frost dates by a half-zone or more from the statewide figure.
Find your exact zone in Michigan
The 4a-6b range is statewide. Growli pins your hardiness zone and frost dates to your exact ZIP code and sends a push notification before any forecast frost night for your saved location.
Frequently asked questions
What hardiness zone is Michigan?
Michigan spans USDA hardiness zones 4a-6b on the 2023 USDA Plant Hardiness Zone Map. The most common zone — covering the largest share of the populated state — is zone 6a. The coldest areas are the western Upper Peninsula interior (zone 4a) and the warmest are the southeast near Detroit and the Lake Michigan fruit belt (zone 6b).
When is the last frost in Michigan?
Across most of Michigan the average last spring frost falls around mid-May and the first fall frost around early October. These are statewide averages — colder, higher areas run later in spring and earlier in fall, so check a ZIP-level estimate for your exact spot.
What grows well in Michigan?
Michigan is moderated by the Great Lakes, which create a milder fruit belt along Lake Michigan and a colder interior Upper Peninsula. Match plants to your local half-zone within the 4a-6b range: choose varieties hardy to at least zone 6a for reliable overwintering, and time tender crops around your local frost dates. The zone 6 planting guide lists vegetables, fruit, and ornamentals suited to most of the state.
Why does Michigan have more than one hardiness zone?
Hardiness zones track the average annual coldest temperature, which changes with latitude, elevation, distance from water, and urban heat. That is why Michigan ranges from the western Upper Peninsula interior (zone 4a) to the southeast near Detroit and the Lake Michigan fruit belt (zone 6b) — a span of 4a-6b — even though it is a single state.
Did Michigan's hardiness zone change in 2023?
The USDA updated the Plant Hardiness Zone Map in November 2023 using 1991-2020 climate data. About half the country, including parts of Michigan, shifted to the next warmer half-zone versus the 2012 map. The 4a-6b range here reflects the current 2023 map. Always confirm your address against the official USDA map for plant-survival decisions.