brown spots on trunk of Silver Maple and Arizona Ash

Question

I have brown spots on the trunk of my Silver Maple and Arizona Ash. They do not look under any stress. Both were planted this past spring. Any advice?

Answer 1

I have not been able to determine a cause from your description.

Here is a link.
Review the article and see if any other symptoms can be see in your trees.

https://www.gardeningknowhow.com/ornamental/trees/maple/maple-tree-bark-disease.htm