Jan, your thread on lilies tweaked a question in my mind that I thought I would do as a new thread. What is the trade off between dividing lilies and just letting them grow their tubers? We have not divided ours for years. We have a rope jungle in the tubs and on the floor of the pond where they have grown out of the tubs. The lilies seem to be doing fine and spreading. I will pull the tubers on the floor when they have spread as far as I am willing to permit. The tubs allow us to give each color its own location (deep red, pink, yellow, white) The big-leafed whites from Tom LeBron are doing most of the spreading on the floor. I am interested in anyone's thoughts about dividing or not dividing.