4-Way Combo Plum is an upright form tree with four different plum varieties (possibility of ‘Stanley’, ‘Yellow Egg’, ‘Brooks’, Italian’, ‘Seneca’, or ‘Green Gage’) grafted onto the same tree that flower at the same time and cross-pollinates. Self-fertile. Grows 15-18’ tall (semi-dwarf). Hardy to USDA zone 5. 7-gallon pot.