Noteworthy CharacteristicsThis is one of the most widely recognized species of hydrangeas, and it boasts a plentiful number of cultivars. The species is divided into two groups: the hortensias (or "mopheads") have globe-shaped flowers made up of large male flowers, and the lacecaps have flattened flower heads, with central, female blossoms ringed in larger, male blossoms. 

CareGrow in moist, well-drained soil, in sun to partial shade. Provide shelter from drying winds. This hydrangea flowers on the previous season's wood and can be maintained by cutting back just to the first pair of buds beneath the old flower in spring.

PropagationSow seed in a cold frame in spring; take softwood cuttings in early summer, hardwood cuttings in winter.

ProblemsGray mold, slugs, powdery mildew, rust, ringspot virus, leaf spots