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HARDINESS ZONES
A Convenient Reference to U.S. Hardiness Zones
Plant material on this web site is rated with a USDA zone number. If the number is the same as or smaller than your zone number, the plant material listed should be hardy to your locale under normal conditions.
Note that the information on this page is a guide. Contact your County Agricultural Agent or State Forestry Department for your specific situation.
| Hardiness Rating | ||
| ZONE 3 | -40° to -30° | |
| ZONE 4 | -30° to -20° | |
| ZONE 5 | -20° to -10° | |
| ZONE 6 | -10° to 0° | |
| ZONE 7 | 0° to 10° | |
| ZONE 8 | 10° to 20° | |
| ZONE 9 | 20° to 30° | |
| ZONE 10 | 30° to 40° | |
Ground Roots
255 Zeigler Road, P. O. Box 70, Dover, PA 17315
800-345-3406 • 717-292-5683 • Fax 717-292-4129