Rose of Sharon, also called Althaea, is a large hibiscus shrub with lovely rose, purple, white, or blue flowers about 3 inches (8 centimeters) wide. The flowers bloom from midsummer to early fall. The rose of Sharon grows about 12 feet (3.7 meters) high and has large, three-lobed leaves. It is hardy and does well under unfavorable conditions either in the city or in the country. It is native to Eastern Asia and grows in many North American gardens. Gardeners have developed several forms of the shrub. The rose of Sharon may be grown in pots and later transplanted outdoors.
Scientific classification. The rose of Sharon is in the mallow family, Malvaceae. Its scientific name is Hibiscus syriacus.