Hydrangea serrata 'Blue Billow'
Blue Billow has exceptional hardiness. This shrub produces clusters of light blue flowers that last for several weeks in early to midsummer, turning deep crimson as they age. Fall foliage is an attractive shade of burgundy. Excellent in a shady border. Blooms on old wood.
Prefers morning sun and afternoon shade
Height: 3-4'
Spread: 5-6'