Zone: 5-9
Height: 90-120 cm (3-4 ft)
Spread: Same
Bloom: Early summer through fall; blue lacecap type turns dark pink in fall
Foliage: Decidous, sturdy, dark green; to burgundy-reds in fall
Light: Full sun if kept moist; otherwise part shade or shade
Water: Moderate
Soil: Moist but well drained, acidic. Flower colour can be influenced by added lime for purple to pink
Maintenence: After flowering, prune back to pair of two healthy buds; in early spring prune out damaged or diseased stems.
Garden site: Accent or massed plantings; informal hedge
Hydrangea serrata 'Blue Billow' (Japanese mountain hydrangea)
The Mountain hydrangea, H. serrata, grows especially well in our maritime climate and has great potential for adding colourful understory splashes in forest gardens.