Tree moss is extremely common. It’s not always necessary to see tree moss as a concern with your trees in Oregon, but you should keep yourself informed when it comes to tree moss.
Is Spanish moss harming my trees?
What's the difference: Lichens vs. mosses
A healthy tree grows no moss, or lichens
How to Remove Spanish Moss from Trees
What Side of the Tree Does Moss Grow On?
What you need to know about Spanish moss
The Truth About Moss - The Natural Navigator
Reasons to Grow Moss Where Grass Will Not Survive
Ivy and Moss On Trees Anthonys Lawn Care & Landscaping
Assistant Curator's Blog: Collecting Moss and Creating Top Dressing — National Bonsai Foundation
How to Grow and Care for Spanish Moss
What You Should Know if Moss is Growing on Your Trees
How to Remove and Prevent Moss in Lawns