Hydrangea involucrata are low growing deciduous sub-shrubs usually with flat lace cap like flowers. Native of Japan and Korea.
Pruning Hydrangea involucrata varieties.
Hydrangea involucrata only need light pruning in spring to remove dead heads and to reshape the bush.
Lace cap flower heads with pale blue (on acid soils) or rosy lillac centres surrounded by white florets.
The flowers are a mixture of fertile and sterile white flowers greening at the base.
Large double white flowers become pink with age.