- (Prunus besseyi) Small, spreading shrubs up to 4 feet tall and hardy in Zones 3 to 6. Bears ½-inch white flowers in late April or early May that ripen into ¾-inch purplish-black fruits in late summer. Fruit is astringent but sweet, and used in jellies or jams and in combination with apples in pies. Plants are native to the Great Plains and very tolerant of dry, sandy soils. 24”-36” size.