Stimulating lower tree branch growth?
We have some mature pittosporum tennufolia that our neighbors have hacked the lower branches off of, often leaving a foot long stump, and often with breakage. The trees have survived this, and I've cut off the extra that they didn't feel like removing (or couldn't reach).
I'd like to know if there's some way to stimulate lower branch growth on these couple of trees. I've heard that if you make some cuts in the trunk, that might work, but I don't really know how to do that.
Has anyone out there had any success with this, or know anyone that has? I could really use some advice.