Is Zone 7 And 7A The Same?
Zone 7: The overall zone has a minimum average of temperatures of 0° to 10°F. Zone 7a: This subzone has a minimum average temperature of 0° to 5° F. What is the difference between 7a and 7b? Hardiness Zone 7’s coldest temperatures fall between zero and ten degrees Fahrenheit. It’s subdivided into Zone 7a—encompassing territories …