Horticultural aide memoire Layer shrubs
Many mature shrubs can be easily propagated by the ancient technique of layering. The climbing hydrangea, H. petiolaris, is a good example. Find a non-flowering shoot and bend it down to a patch of soil cultivated for the purpose. Make a short lengthwise cut through the wood, prop it open with a twig and secure it just under the soil surface with a piece of wire bent double. The tip of the shoot should appear above ground. By the autumn, the layer will have formed roots and can be removed from the parent plant and planted out.