1, the natural maturity season of oranges is generally in mid to late October, that is, the fall market, November to January is the peak of the orange market, some early-maturing varieties will be listed before the Fourth of July, and the late-maturing varieties will continue to the following year in April or so.

2, citrus (CitrusreticulataBlanco) is the Brassicaceae, citrus plants. Prefer warm and humid climate, cold tolerance is slightly stronger than grapefruit, lime, sweet orange. Rutaceae citrus subfamily is distributed between 16 ° ~ 37 ° north latitude. It is a tropical, subtropical evergreen fruit tree (except Hovenia), used for economic cultivation of three genera: Hovenia, Citrus and kumquat. The citrus cultivated in China and the rest of the world is mainly Citrus sinensis.

3. Flowers solitary or in clusters of 2-3; calyx irregularly 5-3-lobed; petals usually less than 1.5 cm long; stamens 20-25, style slender, stigma capitate. Flowering April-May, fruiting October-December.