Caucasian comfrey is a robust, clumping perennial notable for its pointed, lance-shaped, dark green leaves and towering clusters of bell-shaped blue flowers. Flourishing in moist, but well-drained soils, caucasian comfrey forms a lush mound reaching a height of up to 60 cm, its deep taproots aiding drought resistance. Its blooms, a magnet for bees, appear predominantly in spring.