Scientific: Hibiscus syriacus
Althea is a quick growing shrub that flowers from mid-summer to mid-fall. It makes a very showy screen that grows to 10 ft. tall and 5 ft. wide in full sun. It grows well in a wide range of soils except for the very wet or very dry soils. Prune Althea back in very early spring to encourage the best flowering. Winter dieback can happen at temperatures of 20 degrees below zero. Althea is also called Rose of Sharon or Hardy Hibiscus and has flowers in red, pink and purple. Plant 3-4 ft. apart for colorful screen.