The kumquat tree (Fortunella spp.) is a small citrus tree native to East Asia. It produces small, oval-shaped fruits with a sweet and tangy flavor. Kumquat trees are ideal for courtyard gardens as they have a compact size and can be grown in containers. They require full sun and well-draining soil. Kumquats can be eaten whole, including the peel, and are often used in marmalades, desserts, or as a unique addition to salads.