Plum Tree

Question

How do I prevent my plums from falling to the ground too early?

Answer 1

A tree can naturally thin out it's crop.
Environmental stresses can cause fruit drop; temperature changes, drought or heavy rains.
One of the most common causes is Plum curlicos.

Here are some links with more information.

https://www.gardeningknowhow.com/edible/fruits/plum/growing-plum-trees.htm
https://www.gardeningknowhow.com/edible/fruits/plum/plum-curculio.htm