Routinely pruning your trees every three to five years is not necessary
But it is a good idea to prune a tree with dead wood—especially when the dead branches are more than two inches in diameter.
These signs mean your tree might be in big trouble
If you see mushrooms or other fungi growing on your tree, or if a big limb breaks off during a storm, have me out for a tree inspection before it’s too late. Those can both be signs of a bigger problem. If the branches of your tree are dying back from the tips, especially at the top, your tree is probably already a goner. Another bad sign: The tree goes straight down into the ground like a telephone pole, instead of flaring out at the bottom.