Additional Information
A difficult species to use in a functional way. Best for seasonal color and fragrance in the border or as an occasional specimen. Deadheading can promote flowering and prevent alternate bearing. Will get leggy without pruning (prune on a 3-year cycle). Powdery mildew is an increasingly serious problem the further south this is planted in its hardiness zone. Also affected by blights, leaf spots, borers, scale, and other diseases and pests. Grows better in colder climates. Young leaves are prone to frost injury.
