Well, that really depends on the trees. If they are young and have not reached their full height yet, then trimming may be necessary to help them grow in a desired direction or to remove dead branches. However, if the trees are older and have reached their full height, then trimming is probably not necessary. In fact, it could even be harmful to the tree if done improperly. So before you go trimming any trees, it's best to check with an expert to see what kind of trimming is necessary and what kind isn't.

It depends on the condition of your trees. If they are healthy and don't need any trimming, then you probably don't need to trim them. However, if they are diseased or have broken limbs, then you will need to trim them in order to maintain their health and safety.