I'm doing some massive landscaping for a guy that has really let his place go. One area I'm not real sure about is trimming is evergreens. They are very established, I'd say 20 years old and evenly spaced apart. The problem is the west side of them if you lean over you can walk under the limbs. You can see the ground and roots growing across the grown. On the east side of the trees limbs are thick and running across the grown with a lot of new growth. You can't begin to see the grown or hardly work your way under them. The question is should I cut all these long over grown limbs off to let the other limbs that are just approaching the gown grow and let light through to the west side of the tree? Ans also, should I mulch the bare ground under the western side of these trees?