As climate change warms the Earth, plant hardiness zones are shifting northward. The U.S. Department of Agriculture has updated its plant hardiness zone map, which shows where various plants will ...

The USDA divides the United States into seven planting regions, known as hardiness zones, which were most recently updated in 2023. The maps below show these planting regions.

The map is based on the 30-year average of the lowest annual winter temperatures for specific places. It is divided into 13 zones, each reflecting a 10-degree temperature range, and each zone is ...

The 2023 USDA plant hardiness zone map shows the areas where plants can be expected to grow, based on extreme winter temperatures. Darker shades (purple to blue) denote colder zones, phasing ...

The USDA divides the United States into seven planting regions, known as hardiness zones, which were most recently updated in 2023. The maps below show these planting regions. North Central US ...

The new 2023 map also is divided into 10-degree Fahrenheit zones and further divided into 5-degree Fahrenheit half-zones, to reflect microclimates and the inclusion of more weather data.

There's a good chance your zone shifted when the USDA updated its plant hardiness map in 2023. Zoom in on what that means for your garden. The USDA's gardening zones shifted.

Plant hardiness zones in Wisconsin range from 6a, which denotes an average minimum temperature of -5 to -10 degrees, to 3b, which is an average minimum of -30 to -35 degrees.