I go two small Patiohit Rose plants from Home Depot or Lowes back in the spring. I have kept them outside and they have done pretty good, but I was wondering what their Cold Hardiness is?  I can't find much info on this plant.  I have them in a clay pot but I didn't know if I should put them in the ground or if they are cold hardiness enough to bring them inside. Any help would be great.