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USDA Plan Hardiness Zone

Zone

Fahrenheit

Example Cities

1 Below -50 F Fairbanks, Alaska; Resolute, Northwest Territories (Canada)
2a -50 to -45 F Prudhoe Bay, Alaska; Flin Flon, Manitoba (Canada)
2b -45 to -40 F Unalakleet, Alaska; Pinecreek, Minnesota
3a -40 to -35 F International Falls, Minnesota; St. Michael, Alaska
3b -35 to -30 F Tomahawk, Wisconsin; Sidney, Montana
4a -30 to -25 F Minneapolis/St.Paul, Minnesota; Lewistown, Montana
4b -25 to -20 F Northwood, Iowa; Nebraska
5a -20 to -15 F Des Moines, Iowa; Illinois
5b -15 to -10 F Columbia, Missouri; Mansfield, Pennsylvania
6a -10 to -5 F St. Louis, Missouri; Lebanon, Pennsylvania
6b -5 to 0 F McMinnville, Tennessee; Branson, Missouri
7a 0 to 5 F Oklahoma City, Oklahoma; South Boston, Virginia
7b 5 to 10 F Little Rock, Arkansas; Griffin, Georgia
8a 10 to 15 F Tifton, Georgia; Dallas, Texas
8b 15 to 20 F Austin, Texas; Gainesville, Florida
9a 20 to 25 F Houston, Texas; St. Augustine, Florida
9b 25 to 30 F Brownsville, Texas; Fort Pierce, Florida
10a 30 to 35 F Naples, Florida; Victorville, California
10b 35 to 40 F Miami, Florida; Coral Gables, Florida
11 above 40 F Honolulu, Hawaii; Mazatlan, Mexico