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, ...

I answer a lot of questions from home gardeners on our Garden Hotline. Quite a few questions deal with lichens. The resident asks, “Are they killing my tree?” Lichens (pronounced lie-kenz) have been ...

Q: The pictures are of a ginkgo tree that is completely covered with this fungus. It was also on our Encore azaleas and some older oak trees and other shrubs. We lost all our azaleas, some other ...