My mature cherry tree's leaves are turning yellow and falling in mid September.?Ther are no spotsor drying of theleaves.They are just pure yellow,soft and falling.
Certified GKH Gardening Expert
This is, most likely, a fertilization issue. Go ahead and apply dolomitic lime to the soil, as to control the pH, just in case this is the issue. A pH swing can appear as a deficiency.
Here is an article for more information: https://www.gardeningknowhow.com/edible/fruits/cherry/when-to-fertilize-cherry-trees.htm