Hemlock hedge is overgrown
We have a beautiful hemlock hedge that is over 100 feet long. We are not good trimmers since it looked just beautiful weeping into our yard. Well now it is gigantic and growing into overhead power lines. The hedge is more like a tree line! We have drastically trimed back part of it to find lot's of bare spots. Yikes! I hope we haven't ruined part of the hedge. What is the best way to trim the hedge back.