Name: greene Savannah, GA (Sunset 28) (Zone 8b) I have no use for internet bullies!
That link is good and will let you know your zone for the cold temperatures that your plants will tolerate.
There is another type of zone called Sunset which takes into consideration things other than just the cold temperatures.
Here is the explanation and a map of your area. http://www.sunset.com/garden/c... http://www.sunset.com/garden/c...
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"
and will let you know your zone for the cold temperatures that your plants will tolerate. 