Peach Tree Leaves Turning Yellow and Dropping

Question

Trees are about 4 years old. I live in Denver, CO. Natural soil is high clay content, but I planted with lots of compost and peat mixed in.

Answer 1

There are many reasons that this could happen. I would look to make sure that it is getting enough water and, if you have not fertilized, I would go ahead and do this (after the plant has been well watered).

This article will have some other suggestions on what it could be:
https://www.gardeningknowhow.com/plant-problems/environmental/plant-leaves-turn-yellow.htm