Cross-breeding of camellias has produced many cultivars which are tolerant of hardiness zone 6 winters. It is hardy to USDA plant hardiness zone 3. In temperate climates they behave as annuals (hardiness 9a-11). Hyattsville lies within USDA plant hardiness zone 7a. It lies in USDA Plant hardiness zone 4a. It is in USDA Plant Hardiness Zone 4b. The Nashville region lies within USDA Plant Hardiness Zone 7a. Allentown falls under the USDA 6b Plant Hardiness zone. It is in USDA plant hardiness zone 10a. Bethlehem falls under the USDA 6b Plant Hardiness zone. Brooklyn lies in the USDA 7b plant hardiness zone. The USDA places Osoyoos in Plant Hardiness Zone 7a. Baltimore is part of USDA plant hardiness zones 7b and 8a. Columbus is within USDA hardiness zone 6a. Brookline falls under the USDA 6b Plant Hardiness zone.