I have a hedge that has been poorly taken care of for many years. Last year we took 8-10 maple and mulberry saplings, up to 4" in diameter, out of the hedge. It looked terrible. Later we trimmed them down to about 6' tall and tried to shape them a bit, they are still really scraggly looking and very woody. I am wondering if we should just trim them down to about 12" above the ground to encourage less woody growth, or would this just kill them? What advice can anyone give me about this poor hedge?