I've heard the beekeepers all mention Boneset from time to time but I never knew what they were talking about. Oh well that's OK 'cause I don't know what Comfrey is either. I had never heard of either until I started coming to this website.nelson castro said:Comfrey is known by many names including knitbone, boneset, wallwort and bruisewort. It is a good source of potassium, nitrogen, phosphorus and calcium for your plants. You can even make a liquid fertilizer from comfrey compost, also called compost tea.