I had the original scarlet/orange and the white one.I let them go dry and kept them in their pots in my attached garage in zone 6. Year after year-(4 or 5) they survived and increased. I should have changed their soil but I didn't, all tho I fertilized them several times each summer. When it warmed up in spring, I brought them out and started watering them a little , and after a week or two, the shoots started coming up. No troubles, except for a huge toad.. When I watered one, the toad scrambled to the surface and gave me a start!