Updated 2023 Plant Hardiness Map
The United States Department of Agriculture released an updated Plant Hardiness Zone map on November 15 that reflects changes for about half of the country. This updated map, the first since 2012, is based on the average coldest winter temperature, on the coldest night of the year, for each region of the country. The trend shown on this map paints an accurate picture of how many parts of our country are warming. The USDA cautions, however, that the data...