Zone 10 (30 to 40 °F) includes many of Florida’s coastal gems, such as Tampa, Clearwater, most of Sarasota, Naples, Vero Beach, West Palm Beach, Ft. Lauderdale, and parts of Miami.

The warmest zone, 11b, is in Key West, Florida, where the coldest annual lows range from 45 F to 50 F. On the 2012 map, northern Minnesota had a much more extensive and continuous zone 3a.

The zones are displayed in 10ºF increments, and 5ºF half zones. To find the Plant Hardiness Zone at your location go to this link https://planthardiness.ars.usda.gov/.

But some plants that once thrived in your yard may not flourish there now. To understand why, look to the U.S. Department of Agriculture's recent update of its plant hardiness zone map, which has ...