I'd be happy to send you some root cuttings. We grow Russian Bocking-14 (Symphytum x uplandicum) under our trees and True Comfrey elsewhere for medicine. Shoot me a PM and let me know which you're looking for.
-ian
Hey Ian,
Do you still have some root cuttings? I would love to get some from you. I would be interested in the bocking-14. I can buy or trade.