Hydrangea macrophylla 'Blue Wave' (Hydrangeaceae)
Both the color and the unique shape of 'Blue Wave's' lacecap flowers are eye-catching. Flat-topped blooms of 1' or more are trimmed with steel-blue florets that create a sort of pinwheel effect. Light shade suits this summer-blooming, quietly elegant shrub. Its form is loose and somewhat rounded. Prune or lightly shape after flowering, as flowers occur on buds from the previous season's growth.
Bloom color: steel-blue
Bloom period: mid-summer
Container size: Gal.