Grown mostly in California, mandarins are considered a winter fruit and are in season November through April. This is when a lot of other fruits are out of season, like berries. Common Types of Mandarin Oranges Clementines: The smallest mandarin orange, they are seedless and very easy to peel, making them a great choice for kids. Tangerines: This larger variety of mandarin orange is more tart and has a deeper orange/red color. Sumo: A larger variety that has the most intense orange flavor. Satsuma: Originating from Japan, this seedless variety has a thicker, more delicate skin and bruises