|Spreading deciduous shrub grown for its clusters of fragrant flowers throughout the summer. Panicles up to 6 inches long of dense fragrant flowers are pale lilac to blue. Graceful, arching branches bear slender leaves. Reaches 4 feet to 5 feet tall. Ideal for attracting butterflies. Combines well with other perennials, especially daylilies and shasta daisies. This is one plant that thrives on severe pruning.