I have one in my yard, and a root clipping from last spring in a small pot with my trees. I was hoping to make it an accent plant. These plants are hardy. I chop mine back every fall because it gets big and unruly.Other than that I kind of ignore it. haha It comes back every spring.
Mine is vivid pink. I have also seen them white.
This species is different than mine. Mine go through winter outside, although I'm not sure if they "need" it. As long as you keep it watered and provide light, it will be fine. It looks really healthy.