Question: I have a multi-trunk Albizia julibrissin that is 7 to 8 years old. It started out with five trunks, but one died off the first year and another was growing out of the center and slowly got ...

Q. What does Cornell recommend doing with cavities in trees? Should I fill them? Should the tree be taken down? — Patrick, Grahamsville A. The most common causes of cavities are improper pruning, ...

Q: I have a tree that appears to be doing well but which has a couple hollowed-out branch stubs. Should I fill them in so it doesn’t cause problems? A: No, leave them as-is unless a certified arborist ...

Q: I have a tree problem. A cavity is developing, about the size of a large saucer, in the main trunk of a 25-foot hawthorn tree. Are there any remedial steps that I might take to save this tree? A: ...