Overview Resources Document Library Video Library Tree List USDA Zone Map Programs USDA Zone Map Click on your zone from the list below to see suggested tree species. Zone 4b (-25˚F to -20˚F) Zone 5a (-20˚F to -15˚F) Zone 5b (-15˚F to -10˚F) Zone 6a (-10˚F to -5˚F) Zone 6b (-5˚F to 0˚F) Zone 7a (0˚F to 5˚F) Zone 7b (5˚F to 10˚F) Zone 8a (10˚F to 15˚F) Zone 8b (15˚F to 20˚F) Zone 9a (20˚F to 25˚F) Zone 9b (25˚F to 30˚F) Zone 10a (30˚F to 35˚F) Zone 10b (35˚F to 40˚F) Zone 11 (40˚F to 45˚F) Facebook Twitter LinkedIn