These hardy deciduous shrubs bear exotic flowers which smother the dark foliage in late summer and autumn when the blooms of many other plants have faded hibiscus syriacus thrives on most soils but in particularl it is useful for tricky alkaline situations little maintenance is required but rose mallow enjoys a long hot summer to produce the most stunning flowers height 3m 40103941 spread 2m 40639 53441 collection comprises hibiscus syriacus 39mint cream39