Climatic Zones (Approximate lowest temperatures in the Winter.)
Zone 1 -50 degrees F
Zone 2 -45 degrees F
Zone 3 -40 degrees F
Zone 4 -38 degrees F
Zone 5 -28 degrees F
Zone 6 -25 degrees F
Zone 7 -15 degrees F
Zone 8 -5 degrees F
Zone 9 -2 degrees F
Zone 10 0 degrees. F