The United States is divided into 13 different plant hardiness zones, each with "A" and "B" subdivisions. This is a number assigned to a plant that tells you how cold of a temperature the plant can ...

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On Nov. 15, the U.S. Department of Agriculture released a revised version of its Plant Hardiness Zone Map. This map is what home gardeners, as well as professional growers, use to determine which ...

WASHINGTON — If you have any kind of green thumb, you probably know that there are different planting zones depending on where you live. The geographic zones are defined by how cold it gets in the ...

PHOENIX — The U.S. Department of Agriculture’s “plant hardiness zone map” was updated Wednesday for the first time in a decade, depicting the impact climate change will have on gardens and yards ...

A new study divides Brazil into 48 zones, each defined by its climate and soil conditions. Restoration projects can use these ...

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 ...