There are two clumps of perennial tall white Phlox beside the house, and the previous owners planted them in an area that only gets morning sun. These are blooming mostly in September. I thought perhaps if they were moved to the south facing side where they would get sun all day long, they would perform better, and perhaps bloom earlier. But I'm wondering if it's OK to transplant them now before they bloom, and may not suffer much if I take most of the root ball and water well? Or would it just be best to wait? Also is it true with this type of plant, they will grow from root cuttings? Thank you.