Do you need to plant two plum trees for pollination?
It depends. Some plum tree varieties are self-pollinating, and some require another plum tree as a pollinator. Stanley Plum, a European variety that produces freestone fruits, does not require a pollinator. In its product descriptions, Gurney's lists whether a second plum tree is needed as a pollinator. Plum trees are some of the easiest fruit trees to grow—and are a good choice for beginner gardeners.