USDA Plant Hardiness Zone Mapzone
Fahrenheit / Celsius - Example Locations
1 Below -50F Below -45.6C Fairbanks, Alaska; Northwest Territories Canada
2a -50 to -45F -48.8 to -45.5C Alaska; Manitoba, Canada
2b -45 to -40F -40.0 to -42.7C Alaska; Minnesota
3a -40 to -35F -37.3 to -39.9C International Falls, MN; St. Michael, Alaska
3b -35 to -30F -34.5 to -37.2C Tomahawk, Wisconsin; Sidney, Montana
4a -30 to -25F -31.7 to -34.4C Minneapolis, MN; Lewistown, MT
4b -25 to -20F -28.9 to -31.6C Northwood, Iowa; Nebraska
5a -20 to -15F -26.2 to -28.8C Des Moines, Iowa; Illinois
5b -15 to -10F -23.4 to -26.1C Columbia, Missouri; Mansfield, PA
6a -10 to -5F -20.6 to -23.3C St. Louis, MO; Lebanon, Pennsylvania
6b -5 to 0 F -17.8 to -20.5C McMinniville, TN; Branson, MO
7a 0 to 5F -15.0 to -17.7C Oklahoma City, OK; South Boston, VA
7b 5 to 10 F -12.3 to -14.9C Little Rock, AR; Griffin, GA
8a 10 to 15F - 9/5 to -12.2C Tifton, GA; Dallas, TX
8b 15 to 20F -6.7 to - 9.4C Austin, TX; Gainesville, FL
9a 20 to 25F - 3.9 to - 6.6C Houston, TX; St. Augustine, FL
9b 25 to 30F -1.2 to -3.8C Brownsville, TX; Ft. Pierce, FL
10a 30 to 35F 1.6 to -1.1C Naples, FL; Victorville, CA
10b 35 to 40F 4.4 to 1.7C Miami, FL; Coral Gables, FL
11 above 40 above 4.5C Honolulu; Matatlan, Mexico
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