Tim Kohlhauff remembers the days when his hometown of Spokane, Washington was in zone 5b on the Plant Hardiness Zone Map. When he was growing up, daisies, rhododendrons, and azaleas were always ...

URBANA, Ill. — On a cold, blustery January day, it may be hard to remember that 2023 was the hottest year on record. But the newest update to the plant hardiness map, in which half the country shifted ...

WASHINGTON — Southern staples like magnolia trees and camellias may now be able to grow without frost damage in once-frigid Boston. The U.S. Department of Agriculture’s “plant hardiness zone map” was ...

A map relied upon by many of America's 80 million gardeners and growers just got its first update in more than a decade. The U.S. Department of Agriculture's Plant Hardiness Zone Map shows warmer ...

About half of the country moved into a slightly warmer zone in the Agriculture Department’s new “plant hardiness” map, an important guide for gardeners. Climate change may be a factor. By Remy Tumin ...