AboutJim Hyland Expertise I am an expert in Forestry, Forest Entomology, Forest Pest Control, and Forest Health. Extensive knowledge in Identification of insects and diseases of trees. Expert on Bark beetles and other insects that attack forests. Also a Registrated Forester with extensive knowledge in the management and care of forests.
Experience 34 years as State Pest Management Chief in a Southern state. Extensive knowledge in Forestry.
BS with major in Forest Management and Entomology Registered Forester Certified Pesticide Appicator
Question Is there a good reason why one of my cottonwoods has leaves that are turning yellow and falling this early?
Answer More than likely the weather. Cottonwoods are one of the first trees that will drop their leaves in the Fall. If the weather is hot and dry they seem to compensate by dropping leaves. It could also have a leaf disease (leaf rust or spots) that will cause the early leaf drop. If this is the case fungi that infect leaves late in the season do not really do much damage to the health of the tree. I would not worry about this early leaf drop of cottonwood trees. .