15-20' Not a hybrid, but included here since it may be the best pollinator for hybrid plums.
Seedling plum native to much of North America that grows in thickets and produces very decent red, yellow and orange 1" fruit, suitable for fresh eating, canning and freezing. Spectacular white bloom in spring is highly ornamental. Red fall color. Plant singly as a graceful specimen or let the branches intertwine with other plums for maximum pollination, with one American plum for every 3-4 hybrid trees. Tends to sucker freely. This tree stock is significantly larger than plum seedling rootstock.
Extremely hardy. Z3. Maine Grown. (3-6' bare-root trees)