Q.What is causing these marks on my tree?
I have a Kwanzan Cherry Blossom Tree that has these weird marks on the trunk of the tree. I put insecticide and fungicide on all my trees and plants to prevent any pests or fungal diseases.
Certified GKH Gardening Expert
These are called lenticels and they are present on all cherries to a degree. In fact, they are present in almost all of the Prunus genus. This is no cause for concern. It is just a part of the tree.
This article will help you with their care: https://www.gardeningknowhow.com/ornamental/trees/ornamental-cherry/kwanzan-cherry-trees.htm