Blue Billow (Hydrangea macrophylla serrata)

'Blue Billow' is a lovely, Lace-cap Hydrangea whose clusters of light blue flowers last for several weeks in early to midsummer. They turn a stunning deep crimson as they age, a fine color echo to the leaves, which become an attractive shade of burgundy in fall. An excellent shrub for a shady border with ferns and astilbes. Grow in average soil.

Zones 5-9