Hi,
I grow this. It's in bud right now. It has a hard time increasing, I think the voles eat it. There are 5-6 plants right now. They seem to be rhizomatous, they come up at 12" or more spacing from each other. They've been roaming in the same 6' area for many years. Maybe we could do a trade later this summer? Anyone with NARGS as part of their name is sure to have some interesting plants!
Pat