A citrus tree is a type of fruit tree that produces citrus fruits such as oranges, lemons, limes, grapefruits, and tangerines These trees are native to Southeast Asia and are widely cultivated in many parts of the world, including the United States, Spain, Italy, and Israel They are typically grown in warm, sunny climates and require well-draining soil and regular irrigation Citrus trees are evergreen and can grow up to 30 feet tall They have glossy, dark green leaves and fragrant flowers that bloom in the spring The fruit of a citrus tree typically ripens in the fall or winter