Plant: clumping perennial to 4'

Origin: eastern US

Zone: 4 - 9

Flowers: fragrant, five petaled flowers with tubular base crowded along the ends of the stems. Many cultivars and colors available.

Foliage: simple, opposite leaves.

Culture: full sun to part shade in well drained soil. Drought tolerant. Prune back stems after blooming to encourage a second flush of smaller blooms.