The best time to grow satsuma mandarin trees begins in early spring or late March. Mature satsuma mandarin trees are much more tolerant to cold than other breeds of mandarin trees; however, young satsuma trees should be protected from the cold during their first few growing season.
Satsuma mandarin trees bear the best fruit during the colder fall and winter months if they are planted in early to late spring. The fruit should be harvested as soon as it matures, as fruit that is left on the tree quickly dries out and takes on a gritty texture.
Satsuma trees are also generally slow-growing and may take up to three years to reach maturity. Adult satsumas can reach nearly 20 feet tall if allowed to grow unchecked.