Gardeners and homeowners often contact our Horticulture Hotline at Cornell Cooperative Extension in Oriskany when they notice a grayish blue-green crusty or mossy looking growth on trees, shrubs, ...

I spoke to a homeowner recently who asked if a gray moss-like growth on limbs and twigs on their trees and shrubs was the primary reason for their decline. Trees and shrubs, however frequently have ...

Question: There is something growing on the branches of one of our shade trees that make me nervous. Is this tree in trouble? Answer: The growths are called lichens. Lichens consist of a fungus and a ...

NACOGDOCHES, Texas (KTRE) - Often, I get the inquiry about that “green and grey fungus that is killing my tree.” At this time of the year when most leaves are off trees and shrubs, these growths are ...

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. It sounds like you are describing what is known as a burl. Burls are round or ...

On the bark of my tree, I noticed grayish growth. I can peel this growth off fairly easily. What is this growth and is it hurting my tree? I have been asked some form of this question at Possum’s, on ...