Hibiscus syriacus 'Notwood3' has gorgeous double blue flowers with lacy centers. This is an upright shrub 8 to 12 feet tall. It blooms from mid summer to fall and produces nearly sterile flowers with very few unwanted seed capsules. This is a member of the Chiffon series. It is hardy in zones 5-9. When the species was named syriacus, it was thought to have originated in Syria, but it is actually native to China and India.