Colorado gardeners eyeing warmer USDA growing zones should be careful, experts say The map was updated for the first time since 2012, but don’t load up on heat-loving perennials just yet Share this: ...

Here is a look at some of the weather service's new maps it pushes out on its Twitter, Facebook and website. The Boulder agency covers Northern Colorado, Denver and the Eastern Plains.

Colorado gardeners eyeing the U.S. Department of Agriculture’s updated Plant Hardiness Zone Map, which moves much of the state in a warmer growing zone, should hold their horses — or trowels — before ...