I have a common (what I would call wild) milkweed that appeared in my garden last summer. It has putout a runner which I moved from where it came up. Can't remember if I cut the runner but I hope not.. Hoping to establish a clump. I also have the Asclepius tuberosa that is orange. I had 3 plants that I purchased from spring hill several years ago.. Now there are only 2. Think I lost the other one before last summer. They are beautiful.. Love them.. Does anyone know if they can be devidedand if so when?