Citrus sinensis originally come from China and Southeast Asia. Sweet Orange is a compact evergreen tree 20-30 ft tall with a rounded, symmetrical crown spreading 15-20 ft or so. The leaves are shiny and leathery, oblong to elliptic, up to 4 in long, and have narrow wings on their petioles (leaf stems). The twigs on many orange cultivars are thorny. Orange blossoms are white, very fragrant, and arranged in clusters of 1-6. They bloom in spring and give rise to oranges the following autumn or winter.
Orange trees are widely cultivated in tropical and subtropical climates for the delicious sweet fruit, which is peeled or cut (to avoid the bitter rind) and eaten whole, or processed to extract orange juice, and also for the fragrant peel. For culture Citrus sinensis need full sun to light shade or very high interior lighting with a well drained soil mix.