The lime tree (Citrus aurantifolia) is a small evergreen tree native to Southeast Asia. It is known for its small, round fruits with a tart and acidic flavor. Lime trees are great for courtyard gardens as they can be grown in containers and have a compact size. They require full sun and well-draining soil. Limes are versatile fruits that can be used in a variety of dishes, from cocktails and marinades to desserts and savory recipes.