Lisa
You are in the same USDA zone as I am, and since our plants will soon be going dormant I would not cut the plant. It really is too late to (predictably) have the cuttings root and if you store the cuttings over the winter/fall, they will desiccate more than the (complete) plant would. I would do the cutting next spring/early summer and then root them, sell them, or trade them. Cut the two branches so that the cuttings are 1-2' long. Is this the Celadine?
Celadine