Dear Deb, Comfrey has been used for centuries and is known as knitbone. Contemporary herbalists have an ambivalent and controversial view of comfrey, despite a tradition of use by herbalists over history. Its traditional names of knitbone, boneset and the derivation of its Latin name Symphytum (from the Greek symphis, meaning growing together of bones, and phyton, a plant), speak to its long and widespread usage as a therapeutic herb. It is wonderful as a skin ointment for healing Rugby wounds. As is witch hazel.
It the plant that is, requires copious amounts of nitrogen. Plenty of manure and a most weed free place and it grows like stink.
Lovely plant as well.
Good you like it!
Regards from a most cold England.
Neil.