Plums are medium sized deciduous trees. For best results always ask a local nursery for advice on choosing the best variety and rootstock for your garden. The following varieties can be used as cross pollinators for Black Pearl: African Rose, Pioneer, African Delight, Harry Pickstone, Angelino, Fortune, Ruby Sun, Mark, Sun Kissed, Red Diamond. Black Pearl plums are black with beet-red flesh. The plum is sweet and slightly tart.