plum trees

Question

I have had a plum tree for 3 years and never had any fruit and this year plenty of leaves but no blossoms.

Answer 1

Plum Trees began to bear fruit at 3 to 6 years of age.
Your tree is just becoming mature enough to bear fruit.

Here is an article with more information.
https://www.gardeningknowhow.com/edible/fruits/plum/plum-trees-not-fruiting.htm