I had to cut the holly trees in my front yard way, way back last year. Unfortunately, they had been growing from some large branches near the ground on one side only. Now that I've cut them way back, the new growth is only from one side. Is there a way I can nick the outer bark on the other side to encourage growth of new branches from other areas where I want growth so as to end up with an evenly growing tree? Not sure if it's even possible, but I have grown new branches and roots in rubber trees, for example, by cutting away the bark in a certain area, then applying root compound to encourage new roots in that specific area. Can I do something similar with holly trees?