Hibiscus
Also called rose-of-sharon or shrub althaea
(Hibiscus syriacus)
 
 Two- to 4-inch single, double, or semi-double flowers in late summer with light green foliage.  Some varieties have variegated leaves.  Flower colors include white, pink, red, blue, and violet bicolors.
 
Zone: 6
Light and Soil: Full sun or partial shade.  Moist, well-drained soil.
Height: 6-10' or more
 
Comments
Soot-resistant.  Can be trained to tree form through pruning.  Use in hard-to-plant, narrow areas.  Plant in hedges, screens, or as specimen plants.  Hardy in seashore locations.  Young plants will need winter protection in cold areas.  Valued for its late blooming color.