The mandarin tree (Citrus reticulata) is a small citrus tree that produces small, easy-to-peel fruits with a sweet and tangy flavor. It is a great choice for courtyard gardens as it can be grown in containers and has a compact size. Mandarin trees require full sun and well-draining soil. They are known for their abundant harvests and are perfect for snacking, adding to salads, or making delicious citrus desserts.