Citrus holds year-round interest in the garden and landscape. For starters, citrus are evergreen trees and shrubs native to subtropical and tropical regions of Asia. They originated at the foothills of the Himalayan mountains from trifoliate citrus (Citrus trifoliate).
Citrus trees generally are only winter-hardy in USDA plant hardiness zones 9a through 11. In the remainder of the hardiness zones, …
