Climate change is shifting the zones where plants grow. ... winter temperatures have warmed by 1.5 hardiness zones—15 degrees F (8.3 C)—over the same 30-year window.

As climate change warms the Earth, plant hardiness zones are shifting northward. The U.S. Department of Agriculture has updated its plant hardiness zone map, which shows where various plants will ...

Holly Jones started studying the micro-climate and the topography on her family farm near Crawfordsville, about 40 miles south of Iowa City, Iowa.

Raspberries are hardy in zones 3-9, and blackberries are hardy in zones 5-9. This eliminates a lot of guesswork for most gardeners, since a majority of U.S. states are dominated by two or more of ...