In the non-flowering stage, bellflower looks very much like the common violet in turf. But, while violets grow in clumps, bellflower forms dense, spreading patches. Both plants are extremely difficult to control. The leaf of bellflower is heart shaped and unevenly toothed along the edges. When allowed to mature, the plant reaches one to three feet tall. Flowers are numerous, nodding, purple and bell-shaped with five petals. They are scattered along the upper portion of the main stem. Bellflower is considered to be a problem of the Northeastern cool season climate, but occasionally it is found as far south as West Virginia.