Interestingly, the first edition of the plant hardiness zone map was created by Arnold Arboretum at Harvard in 1927! And ...

"There are many areas of the U.S. where homeowners are already gardening in February and March." Understanding when you're in the clear starts by understanding your zones. In November, the USDA ...

Plant hardiness zones were developed to help landscapers, gardeners and lawn care enthusiasts avoid this heartache. American farming ... Plant hardiness zone maps are, well, all over the map.

But what, exactly, does that mean? The numbers refer to the U.S. Department of Agriculture’s Plant Hardiness Zone Map, which divides the country into geographic zones that have similar average ...