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United States Hardiness Zones:

Hardiness Zones


Much of the U. S. has been warmer in recent years, and that affects which plants are suitable for planting. The National Arbor Day Foundation has completed an extensive updating of U.S. Hardiness Zones based upon data from 5,000 National Climatic Data Center cooperative stations across the continental United States. The above map reflects these changes.



USDA Average Annual Minimum Temperature Range:

Min Temp

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