Sowing & Growing

Begin sowing seeds thinly in early spring and ensure thorough watering until the plants establish themselves. Once the plants reach a manageable size, thin the seedlings to 30 to 40cm (12 to 16in), arranging them in rows spaced 90cm (36in) apart. For indoor sowing, fill 10cm (4in) pots with a quality potting mix, planting two seeds per pot (approximately 6mm / ¼ in deep). Water adequately. In May, transplant the seedlings outdoors to a prepared comfrey bed following the same row arrangement.

Water as necessary during dry spells and use a hoe to eliminate weeds between the plants. Regularly enrich the soil with compost or manure. Divide plants with multiple crowns, or dig up a portion of the root and replant. Divisions or transplants can be planted until early October. Trim leaves regularly from the base to halt flowering, redirecting the plant’s energy toward leaf production. Comfrey exhibits continuous growth once initiated and persists until the onset of the first cold snap. During winter dormancy, apply a generous layer of manure. To propagate more plants, insert a spade through the centre of a plant, lever up a section, or take root cuttings (approximately 2 inches long). Exercise caution, as leftover bits can readily root wherever they land.