Grafting is the technique of propagating plants by attaching the stem or bud of one plant (called the scion) to the stem or roots of another (the stock or rootstock). Only closely related varieties can be grafted. Roses and fruit trees are often grafted so that good flowering or fruiting varieties have the benefit of strong roots. Grafting is a way of producing new plants that are genetically identical to the parent from which the scions are cut.