An oak tree in my yard has a large growth on it. It doesn’t seem to be hurting the tree, but should I be concerned? — B.I.

Understanding the Context

Most bare-rooted trees and shrubs should be planted in February or March. MSN: How To Get Rid Of Lichen And Moss From Backyard Trees The presence of lichen or moss on backyard trees can understandably be concerning at first. Lichen is a combination of algae and fungus that lives on any number of solid, undisturbed surfaces, ... The Advocate: It's OK to like lichens.

Key Insights

They are crusty and scaly, but they don't harm the trees It's OK to like lichens. They are crusty and scaly, but they don't harm the trees The Mercury News: Lichen is a misunderstood wonder. Here’s where to see it in Sonoma County Lace lichens benefit local flora and fauna — plus, they just look cool. The state lichen can be found draped over tree branches across these Sonoma County parks. Lichen is a misunderstood wonder.

Final Thoughts

Here’s where to see it in Sonoma County