The maps look at the extreme lowest minimum temperature experienced in a particular location over a 30-year time frame, with the new map based on 1991 to 2020. The maps are divided into zones in ...

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.

To help us understand how the opportunity zones are or are not working here in Michigan's biggest city, we're joined by Russ McNamara of Detroit Public Radio. Hey, Russ.