How to Propagate commonName:"comfrey 'Rubrum'"?
Propagate by division or root cuttings

commonName:"comfrey 'Rubrum'" · Symphytum 'Rubrum'
Grow in sun or partial shade in moist, moderately fertile soil. Spreading in habit but should be less of a nuisance than some other very vigorous Symphytum species
Propagate by division or root cuttings