For summer flowering, plant a Rose of Sharon shrub hedge. Hardy in zones 5 through 9, Hibiscus syriacus shrubs perform at their best as full sun shrubs and planted in well drained soil. These flowering shrubs provide long lasting blooms from mid summer to frost. Though they will grow in partially sunny to lightly shaded areas, their blooming may be limited. Rose of Sharon or hibiscus syriacus, which is a deciduous shrub also known as Hardy Hibiscus and Althea.
Although Rose of Sharon bushes will lose their leaves in winter, they still make beautiful flowering privacy hedges in areas for summer use such as planting around swimming pools. Their unusually large blooms attract hummingbirds, butterflies, and bees from mid summer until frost. As these hibiscus bloom much later than most other plants, they are, also, later to leaf out. Expect rose of sharon to leaf out in late spring to early summer.