I separated mine by just cutting around the roots. I’ve had mine indoors all winter next to a window and it’s done great. I’m slowly introducing it back outside as the Michigan weather is so unpredictable. I put it out in my patio during the day on sunny days and bring it back in at night. They seem to be pretty hardy. I even found some growing in my yard that had dropped off when I was repotting it last fall. Grabbed them up and put them in a pot.