Pruning a tree can literally save its life. When a tree is diseased or damaged, then removing the damaged limb means valuable nutrients are not being wasted trying to keep that portion of the tree alive. As a new homeowner whose property has a lot of trees on it, you want to know more about pruning trees. In particular, if there is a specific time of the year when you should hire an arborist to come out and prune your trees for you.