The most popular and well-known climbing hydrangea is Hydrangea anomala subsp. petiolaris. Though slow growing to start with, it is a vigorous climber that can cover outbuildings or brighten up shady house walls. Hydrangea seemannii and H. serratifolia are vigorous evergreen climbers that are perhaps less known as they need to be grown in a sheltered spot and in milder parts of the UK.
Mature plants look spectacular in early summer when in full flower covered with white flowers that are produced on last year’s shoots. Though self-supporting, they benefit from having a structure such as trellis, to help them on the way.
They will grow well in most soils provided they are reasonably moist and fertile. Climbing hydrangeas grow well with a degree of shade, making them well-suited for east- and north-facing walls. They may be also grown in sunnier spot as long as the soil is not too dry. Hydrangea seemannii and H. serratifolia are less hardy and need shelter to thrive.
Climbing hydrangeas grown in very hot and dry spots are unlikely to thrive.
Did you know?
Climbing hydrangeas form aerial roots on stems that cling to a wall or a host plant.
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