Platycodon grandiflorum - Highly ornamental perennial, the young flower buds form balloons, then open up into star shaped vivid blue flowers. The small clusters of multiple stems are compact and become more productive with age. Can grow to 2 feet tall. Loves full sun and is drought resistant. Used in traditional Chinese medicine as Jie ging and is native to China and Japan. The medicinal root is used for lung conditions. Small seeds, start in early spring in pots, sow 1/4 inch deep in a warm location.