'Diana' Rose of Sharon Hibiscus syriacus 'Diana' Photo/Illustration: Bill Johnson 1 2 3 4 5 6 7 8 9 10 11 'Diana' Rose of Sharon (Hibiscus syriacus 'Diana') hy-BIS-kus seer-ee-AY-kus Genus: Hibiscus 'Diana' has deep green foliage and large, pure white flowers that bloom from mid- to late summer. Unlike some other roses of Sharon, its flowers remain open at night. It requires little maintenance and, once established, will tolerate extreme heat, drought, and poor soil. -Judith Ireland, Regional Reports: Northeast, Fine Gardening issue #122 Noteworthy Characteristics: As a mature shrub, this plant can be trained into a small tree. Care: This plant's flowers bloom on new growth, so you should prune it at the end of winter. Propagation: From cuttings. Problems: Leaf spots, Japanese beetles, blight, rust, aphids, scale, whiteflies, and canker. Overview Height 6 ft. to 10 ft. Spread 6 ft. to 10 ft. Growth Pace Invasive/Aggressive Grower, Moderate Grower Light Full Sun to Part Shade Moisture Medium Moisture Maintenance Low Characteristics Attracts Butterflies, Showy Flowers Bloom Time Early Fall, Fall, Late Summer, Summer Flower Color White Uses Beds and Borders, Specimen Plant/Focal Point Style Cottage Garden Seasonal Interest Summer Interest Type Shrubs Hibiscus syriacus 'Diana'View the discussion thread.