Damson Plums bloom in the late spring and offer not only a delicious fruit but also beautiful showy white clusters that cover the tree. Because they bloom in late spring, they are less likely to be damaged by frost. Also, once you plant a Damson Plum tree, you can expect a fruitful harvest in 2-4 years. Blue Damson Plum offers both visual appeal and, when added to jams and baked goods, an immense flavor. Damson plums are oval and are considered clingfruit because the fruit is attached to the stone inside. The taste of Damson Plum depends on when it is harvested off of the tree. If you pick one too soon, you could bite into a very sour plum, while a fully ripe plum boasts a sweet-sour flavour that is bitter unless added with other sweeteners. Damson Plum tree is self-fertile.