British Ruellia, or Purple Ruellia, is a great shrub for landscape borders. Evergreen, mostly herbaceous perennial shrub, quick to establish and grow to 3- to 6-feet tall with equal spread. Becomes lush and full with age. Spreads moderately by underground rhizomes to form clumping colonies. Ruellia flowers attract bees. Deep purple foliage is colorful year-round. In Phoenix, purple, white or pink flowers are produced in all but coldest winter.
