Dear Neil: I have three 35-year-old Arizona ash trees. Some of their heavier branches are rotting, and one has fallen. A tree trimmer has suggested that I let him top the trees to given them more life ...

A: As long as the leaf buds have not begun to open, pruning would not harm the tree. Pruning maydays is best done in the early spring or late fall. I have just a brief word to those of you who are ...