Rhododendron 'Wilgen's Ruby'

Grow in light dappled shade, in a site sheltered from cold, dry winds and late frosts, in moist but well-drained, humus-rich, acidic soil, preferably between pH4.5 and pH5.5; will also tolerate sun and dry soil; for more advice, see rhododendron cultivation

Pruning group 1 or pruning group 8

Propagate by heeled semi-ripe cuttings in late summer, by layering in autumn, or by grafting in late winter or late summer

May be susceptible to vine weevil, rhododendron whiteflies, rhododendron leafhopper, lacebugs, scale insects, caterpillars, and aphids

May be susceptible to powdery mildews, bud blast, honey fungus, rust, leafy gall, petal blight, silver leaf, Phytophthora root and shoot rots, and, if soil is not sufficiently acidic, lime-induced chlorosis; for more advice, see Rhododendron diseases