Growing Regions
26 regions
USDA Zone 10a
35 to 40F. South FL, south CA, south AZ. Near year-round growing.
USDA Zone 10b
40 to 45F. Far south FL, Keys, south CA coastal.
USDA Zone 11a
45 to 50F. Frost-free. Keys, Hawaii.
USDA Zone 11b
50 to 55F. Frost-free. Hawaii, south PR.
USDA Zone 12a
55 to 60F. Tropical. Hawaii lowlands, PR.
USDA Zone 12b
60 to 65F. Tropical. Hawaii coast, PR.
USDA Zone 13a
65 to 70F. Tropical. Hawaii coast, PR south.
USDA Zone 13b
70F+. Tropical. Extreme south PR, south Hawaii.
USDA Zone 1a
Below -50F. Arctic / sub-arctic. Alaska interior. Very limited growing season.
USDA Zone 1b
-50 to -45F. Arctic. Alaska north.
USDA Zone 2a
-45 to -40F. Far north. Alaska / northern plains extreme.
USDA Zone 2b
-40 to -35F. Northern plains. Short season.
USDA Zone 3a
-35 to -30F. Northern tier (MN, ND, MT high).
USDA Zone 3b
-30 to -25F. Upper Midwest / northern plains.
USDA Zone 4a
-25 to -20F. Northern Midwest, northern New England.
USDA Zone 4b
-20 to -15F. Upper Midwest, Maine.
USDA Zone 5a
-15 to -10F. Midwest, NY, northern PA.
USDA Zone 5b
-10 to -5F. Central Midwest, southern NE, upper OH valley.
USDA Zone 6a
-5 to 0F. Central US, mid-Atlantic interior.
USDA Zone 6b
0 to 5F. Mid-Atlantic, Ohio valley, southern Midwest.