Hibiscus syriacus 'Lucy' LUCY ROSE-OF-SHARON

Zone: 5  Height: 8-12 ft.
One of the few late summer blooming shrubs.  Dense, upright growth habit.  Use as a specimen or in borders, also very popular for hedging.  Flowers best in full sun. Flowers are double red.
 
(Tree Form)
 
Photo Credit: www.missouribotanicalgarden.org