Department of Agriculture Plant-Hardiness Zone Map in a special pullout section of the March/April 2003 issue of "The American Gardener". Creation of the map using temperature information from weather stations throughout the United States and compilation by the Meteorological Evaluation Service Co.;...
The U.S. Department of Agriculture has just released a new USDA Hardiness Zone Map. This map...
After all, it was more than a decade ago. That was when USDA last updated its Plant Hardiness Zone Map, by the way. Fast forward to now. The government agency has just unveiled its new-and-improved Plant Hardiness Zone Map. And this one has some extra features.PAUL RUSNAK...