Sowing Direct: Sow seeds thinly in early in spring. Water well until the plants are established. Once the plants are large enough to handle, thin the seedlings to 30 to 40cm (12 to 16in) and arranging the plants in rows 90cm (36in) apart.
Sowing Indoors: Fill 10cm (4in) pots with a decent potting mix, plant two seeds per pot, about 6mm / ¼ in down), Water well as required. In May, transplant outdoors to a prepared comfrey bed (as above). Arrange the plants in rows 90cm (36in) apart.