Hello, We have a very large stellata magnolia that has grown very dense and thick. It hides the view of our large perennial flower beds. I have pruned it out at the bottom and am trying to shape it into a tree like form instead of the dense shrub look. Do I need to seal the cuts on the magnolia where I pruned? Several are very close to the main trunk. I would appreciate any help you might give me. Thank you and I am enjoying your wonderful site.