Thank you everybody!
Karen, I got it at my local nursery last summer. When it lost all its leaves in the fall, I cut it down to just above soil level (as instructed). It got much bigger this year. I have to transplant it - it's started growing into the pebbles below it (and the dirt below the pebbles). Should I transplant it now, or wait until spring? I never know whether to transplant in fall or spring.
Ursula, what do you mean by "corms"?
Melissa