 Three hardiness zones exist . USDA zone 10 is in coastal South Florida where annual extreme low temperatures range from 30 to 40 ° F ( − 1 to 4 ° C ) . Next is zone 9 , found in Central Florida , where low temperatures range from 20 to 30 ° F ( − 7 to − 1 ° C ) . The coolest , zone 8 , is located in northern Florida from roughly Gainesville and northwest including Tallahassee . Low temperatures range from 10 to 20 ° F ( − 12 to − 7 ° C ) . 
