Hibiscus Syriacus Oiseau Bleu / Rose of Sharon in 9cm Pot, Violet Blue Flowers This is a beautiful hibiscus shrub with single violet-blue flowers with a maroon centre. They appear in late Summer to mid-Autumn. Late flowering shrub which adds beauty at the end of Summer when most others are looking tired. The new foliage does not appear until late Spring. Common Name: Rose of Sharon Oiseau Bleu Genus: Hibiscus Species: syriacus Skill Level: Beginner Exposure: Full sun Hardiness: Hardy Soil type: Well-drained/light, Moist, Chalk, Clay, Sand, Loam Height: 1.5-2.5m Spread: 1-1.5m Individual flowers are short-lived, lasting only a day. However, numerous buds are produced on the shrub's new growth, and this provides prolific flowering over a long blooming period. This shrub is deciduous so it will lose all its leaves in autumn, then fresh new foliage appears again each spring.