I did some research on how to propagate a cutting. You are supposed to trim about a 6" piece to root. The easiest way to try to propagate a piece is by using root hormone. I really hate that stuff and hide it so my "Little Garden Helper" or the cats won't get in to it. Have you ever read the label on it?? It's deadly and it really scares me to use it.
Due to the fact that I had really let her go so long without a trim, I had to cut longer pieces then you are supposed to for propagation.