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 U.S. Department of Agriculture's latest Plant Hardiness Zone Map shows Iowa is warming up, at least a little bit. Updated in November for the first time since 2012, the map, a standard guide to ...

Knowing the precise time to get annual plants into the ground and whether or not a perennial will grow in a given location is often buried in local community lore, but the US Department of Agriculture ...

A new Plant Hardiness Zone Map released by the federal government Wednesday shows that temperatures across the country are getting warmer and could affect gardens and crops. The map is designed to ...

Whenever you purchase a new perennial plant, shrub, or tree, you've probably noticed information about hardiness zones on the plant tag or description. But what does it mean? "Plant hardiness zones ...

This week the U.S. Department of Agriculture (USDA) released an updated version of its Plant Hardiness Zone Map (PHZM)—a datum used by gardeners and farmers to determine which plants are most likely ...

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 ...

Westerners may swear by the Sunset maps, but for most of the country the U.S. Department of Agriculture map of plant hardiness zones is the gold standard. Why hasn't it been updated since 1990? A new ...

Unless you've got a heated greenhouse, you won't be able to grow citrus in Michigan or jasmine in New York for the simple fact that the winters are too cold. While the range limits of some plants are ...

A new version of the 'Plant Hardiness' map has been released by the U.S. Department of Agriculture. It enables users to view the average minimum temperatures for separate latitudinal zones -- a useful ...

A new map from the USDA has some northern gardeners hoping to grow plants that used to be considered too fragile for cold weather zones. The hardiness zone chart is about a half zone warmer than the ...