'Blue Billow' Sawtooth Hydrangea blooms in June, producing plentiful blue lacecap flowers for an extended period. The habit is compact, and the neat green foliage turns bronzy in fall. Hydrangea 'Blue Billow' is one of the most cold tolerant serratas. A lovely introduction from Dr. Dick Lightly formerly at Mt. Cuba Center.
USDA Hardiness Zone
Hydrangea serrata Blue Billow #3 15-18" (blue lacecap)