Citrus trees are fruit-bearing trees that belong to the genus Citrus. They are known for producing popular fruits such as oranges, lemons, limes, and grapefruits. These trees thrive in warm, subtropical to tropical climates and require well-drained soil and plenty of sunlight to grow effectively. Citrus trees are evergreen, meaning they retain their leaves year-round. They typically have glossy, dark green leaves and fragrant white flowers. The fruits develop from these flowers and can vary in size, color, and flavor, making them a favorite among gardeners and fruit lovers alike.