I live in southeastern Az. , and I've been noticing, as the peaches develop, they seem to be turning flat like the insides are being sucked dry. What gives? I've followed all the guides to growing peaches. The tree is 2 years old and is in full sun.
Certified GKH Gardening Expert
It sounds like it may be brown rot. This article will help you determine if this is what you have:https://www.gardeningknowhow.com/edible/fruits/peach/brown-rot-fungus.htm