Lack of fruits on trees

Question

We have three dwarf prune plum trees that were planted two years ago and have yet to bear fruit. They are self pollinating and are approximately 8 feet tall with a 1″ diameter trunk.

Answer 1

Plums will began fruiting when they are from 3 to 6 years of age.
Here is a link with more information.

https://www.gardeningknowhow.com/edible/fruits/plum/plum-trees-not-fruiting.htm