hydrangea [RoCo Black Knight]

Grow in moist but well-drained, humus rich soil, ideally in light shade, though will tolerate full sun if soil is not too dry. Mulch in spring, and provide shelter from cold, drying winds. Soil additives may be required to maintain specific flower colours. See hydrangea cultivation for more detailed advice

See pruning group 4 (hydrangeas)

Propagate by softwood cuttings in early summer, or by hardwood cuttings in winter

May be susceptible to aphids, capsid bug, red spider mite, stem and bulb eelworm, vine weevil and scale insects

May be susceptible to honey fungus, grey moulds, powdery mildews, leaf spot and virus diseases