P. Although perennial, hollyhocks are usually treated asor . They may be sown outdoors in May, transplanting to flowering quarters the following spring. The height varies from 6—12 ft. and is obtainable in separate colours or mixed. There are both single and double strains, including the -flowered with a broad, fringed collar of petals and a double centre rosette; Triumph Supreme with frilled and fringed double blooms is a more compact strain growing to only 4 ft., which can be flowered as an from an early spring under glass. Hollyhock rust can be very troublesome in some areas and diseased plants are often discarded after flowering. It can be checked by preventive spraying with a thiram fungicide. Staking is often essential in windy, exposed positions.