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That’s where knowing your plant hardiness zone comes in. The U.S. Department of Agriculture (USDA) has devised a plant hardiness map that divides the country into 13 planting zones based on ...

Interestingly, the first edition of the plant hardiness zone map was created by Arnold Arboretum at Harvard in 1927! And believe it or not, the most recent version of the USDA plant hardiness zone ...

Plant hardiness zone maps are, well, all over the map. Consider the number assigned to your zip code as a starting point. You may live right at the break between one zone and the other.