Q: Bill, on the bark of my Crepe Myrtles, I noticed grayish growth. I can peel this growth off fairly easily. What is this growth and is it hurting my tree? A: It sounds like you have lichens. Lichens ...

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 ...

DALLAS, Pa. — You see it everywhere, growing on the ground, on a tree even on your roof! It sometimes looks like strange green ruffes, scales or even stringy clumps. It is called lichen. Paul shares ...