Sweet oranges belong to the Citrus sinensis botanical species, resulting from the crossbreeding of a pummelo and a mandarin. The types of sweet oranges include navels, valencias, and blood oranges. Navels are seedless because a mutation caused a small fruit to develop on the flower end of the fruit, which creates the "belly button" appearance. The original mutation was found in Brazil in the 1800s and was brought to the United States as the Washington navel orange. Navel oranges are self-fertile and are ready to harvest between November and January. Other noteworthy navel varieties include the Cara Cara, which is deep pink and has an excellent flavor, and Lane Late, which stores well on the tree and can be harvested from February to June. To plant navel oranges, a sunny location in well-draining soil is necessary, with the best planting time being from April through August. Navel oranges must be planted as a grafted tree and purchased from trusted nurseries that follow local regulations. Navel oranges grow with minimal effort, but they require at least 8 hours of direct sun each day and well-draining soil. Watering once a week, avoiding overwatering during the cooler, wet months, and fertilizing with slow-release blends are other necessary care steps. Navel oranges can be grown in USDA zones 8-11, but they can also be grown as containerized patio trees in USDA growing zones 4-11.