Hibiscus syriacus 'Ardens'
DOUBLE PURPLE ALTHEA
Medium size, upright-growing, slender, well-branched shrub reaching 8 to 10 feet tall and 4 to 6 feet wide. Has bright green serrated leaves and produces purple blossoms in late summer. It is easily grown, tolerating a wide range of soil and moisture conditions.
USDA Z5 - Cold Hardy to -10 to -20(F)