Plant hardiness zones are rules that inform gardeners what plants can withstand the local weather. The U.S. Department of Agriculture (USDA) designed a map that separates North America into zones ...

The USDA has updated the geographic zones that help gardeners select plants that are suitable for their regions. Learn why the map changed—and whether your area was affected.

In some areas, including the central Appalachians, northern New England and north central Idaho, winter temperatures have warmed by 1.5 hardiness zones – 15 degrees F (8.3 C) – over the same ...

The USDA Plant Hardiness Zone Map divides North America into 13 zones based on the average annual minimum winter temperature. In 2023, the USDA released an updated hardiness zone map in response ...

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.

KEY CONCEPTS. Plant hardiness zones are shifting north as the U.S. warms, affecting farmers and gardeners. These zones, based on the coldest temperatures of the year, determine which plants can ...

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.

Louisiana's growing zones range from 8b in North Louisiana to 10a at the state's southern-most tip, with majority of the state falling into either zones 8 and 9, according to USDA's Hardiness Zone ...