Opal Plum Tree 4-5ft In 6L Pot, Self-Fertile, Tasty & Sweet, Ready to FruitOpal plums are deliciously sweet, bite sized dessert plums with a great colour range, from sunshine yellow to deep purple. Opal Plums are early cropping plum trees and in a good year you can look forward to the first fruit being ready at the end of July. Because they are so early, Opal plums mature quite fast. They are self fertile. Opal Plum is quite happy to bear a heavy crop all by itself. It is also reassuringly regular in the size of harvest each