The USDA’s Plant Hardiness Zone Map divides the country into 13 zones ranging from 1 (the arctic) to 13 (the tropics) to make it easier for gardeners to select plants that can survive the winter ...

In total, the map includes 26 hardiness zone and half-zone designations, ranging from 1a in the coldest region of Alaska, to 13b along the balmiest parts of the Puerto Rico coast. (The higher the ...

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.

Last updated in 2012, the new map codifies warming temperatures for Massachusetts’ planting zones. So what does that mean for gardeners as we head into another increasingly warm growing season?