Comfrey is a weed here, can't get rid of it - I've been trying for about 5 years. And it propagates very easily.....just let is go to seed or split the roots, meaning if you miss a piece it WILL come back.
However I had a really great recipe for making hand lotion that I have misplaced (this is why I allowed it to grow for as long as I did). Now I only allow it to grow in the rocks - as in fist sized - by the neighbor's fence for the bees
