The year 2012 began with a revision of the USDA Plant Hardiness Zone Map, replacing one that came out in 1990. It's a pretty cool map. As before, its zones are based on average lowest annual ...

Question: How can I make sure I am buying landscape plants that are adapted to our climate? Answer: The U.S. Department of Agriculture has developed a climate zone map so we can select plants that ...

Comparing the 2023 map to the previous version from 2012 clearly shows that as climate change warms the Earth, plant hardiness zones are shifting northward. On average, the coldest days of winter ...

director of the PRISM Climate Group at Oregon State University that jointly developed the map with the USDA. Daly says the new map means about half the country has shifted into a new half zone and ...