The USDA updated its map of plant hardiness zones for the first time in over a decade. The new map shows that half the country has shifted to warmer zones. The updated zones could allow gardeners to ...

The USDA is updating an important map for gardeners and growers picking plants and flowers. The new map shows the contiguous U.S. is about 2.5 degrees Fahrenheit warmer than the last map 11 years ago.