Comfrey

About Comfrey

Called knitbone for its ability to accelerate healing of bones, sprains, and wounds. It contains allantoin, which stimulates cell proliferation and tissue repair. It is banned for internal use in many countries because it contains pyrrolizidine alkaloids that can cause liver damage. It makes an excellent liquid fertilizer - steeping leaves in water creates a nutrient-rich plant feed. It has a deep taproot that mines minerals from subsoil, bringing them to the surface. It is virtually impossible to eradicate once established. Russian comfrey is the most common cultivated variety. The leaves are covered in irritating hairs.