Michigan is home to seven of the 26 half zones, starting as low as minus 30 to minus 25 degrees and topping out at 0 to 5 degrees. Below is a map by zip code of the plant hardiness zones in Michigan.

Those zones are further divided into 5-degee subzones. In Michigan the hardiness zones range from 4 to 6. You probably want to consider hardiness zones when purchasing your landscape plants.