USDA ‘Plant Hardiness’ Map Shifts Temperature Zones North

Many parts of the U.S. may be getting warmer, according to a new, interactive Department of Agriculture map that shows the best places in the country to grow different plants.

The “Plant Hardiness Zone Map,” an update of a 1990 static version, shifts temperatures up one 5-degree increment across much of the country, reflecting newer and more complete data, the USDA said today.