The Princess Kay Plum is an ornamental Plum tree variety. It has a double-flowered selection of Prunus nigra that was discovered in the wild in northern Minnesota. It's a smaller-sized tree with upright branches.

The double, white blooms arrive around early May before the leaves do. This tree contrasts well with its dark-brown bark. It will produce 1 1/2" size reddish fruit. Mature size is around 15' tall x 8-10' wide.