Harebell is a delicate beauty with small blue-violet bell-shaped flowers that nod from the tips of slender stems, blooming in spurts from summer to fall. Rosettes of rounded basal leaves wither early after sending up clusters of wiry stems with long, narrow foliage. 

The slender flowering stems can rise to 12 inches, often becoming so weak that the entire plant bends over. The bloom time can be very sporadic and prolonged. A larger patch of Harebell can start blooming in late spring, and individual plants can continue into August or September, especially if spent blossoms are dead-headed.