Hibiscus syriacus ‘Ardens’ – This is an older cultivar of Hardy Hibiscus with almost carnation-like double lilac-pink blooms with flecks of red in the center. These turn a pale purple as they fade and are contrasted by light green foliage. ‘Ardens’ is a large deciduous shrub that prefers part to full sun and good soil drainage. Grows 8-12′ high by 6-8′ wide. Hardy to zone 5.
Hibiscus syriacus CHINA CHIFFON (syn. ‘Bricutts’) – Part of the Chiffon Series with large 4″ wide white anemone form blooms with a red center that is obscured (so that only the veining shows through) by a central white or very pale pink tuft. It flowers from late July through to September and can be trained into an informal flowering hedge. Grows 8-12′ high by 4-6′ wide. Zone 5.
Hibiscus syriacus ‘Collie Mullens’ – One of the darkest double (to semi-double) forms with deep rose-pink flowers that hold their colour well in full sun exposures. It blooms from late July to October. This shrub tolerates both heat and drought once established but flowers and performs better with even soil moisture that drains. Grows 8-10′ high by 6′ wide. Zone 5.
Hibiscus syriacus VIOLET SATIN (syn. ‘Floru’) – A newer introduction hybridized by Claude Bellion of Minier Nurseries in France. It features large single blooms of violet-pink with a prominent red central blotch. VIOLET SATIN was bred for better plant vigor and more flowers. This species adds a tropical touch to any temperate garden. Grows 8-12′ high by 4-6′ wide. Zone 5.
Hibiscus syriacus ‘Blushing Bride’ – A very popular cultivar with double blooms of pale pink (with reddish highlights in the center) that fade to white with age. Hardy Hibiscus are one of the last shrubs to get their leaves in spring, often just budding when the rhododendrons are in full bloom, so be patient with them. Deer resistant. Grows 8-12′ high by 4-6′ wide. Hardy to zone 5.