About
An evergreen azalea with broadly elliptic, mid green leaves. Rare in cultivation in the UK. 49 of the 50 cultivars introduced by Ernest Wilson from Japan in 1920. A Kurume azalea, no. Flowers are very pale lilac, almost white, flusher with deeper colour at the edges and with brownish speckles on the upper petals in late spring.
About the genus
Rhododendron can be evergreen or deciduous shrubs or trees, with simple leaves, sometimes with a dense colourful indumentum of hairs on the lower side, and funnel-shaped, bell-shaped or tubular flowers that may be solitary or in short racemes
Growing conditions
SunlightPartial shade
Soil typeClay, Loam, Sand
Soil pHAcid
Soil moistureMoist but well-drained
AspectNorth-facing, West-facing
ExposureSheltered
UK hardinessH4
Plant details
Plant typeShrubs
HabitBushy
FoliageEvergreen
Height1-1.5 metres
Spread1-1.5 metres
Time to full height5-10 years
Suggested usesCity and courtyard gardens, Cottage and informal garden
ToxicityHarmful if eaten. Wear gloves and other protective equipment when handling. Pets (dogs, cats, rabbits, tortoises) Harmful if eaten - for further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Care notes
CultivationGrow in moist but well-drained, humus rich, acidic soil, in partial or dappled shade. Choose a site away from frost pockets and sheltered from strong winds, and do not allow plants to dry out. Mulch annually, ideally with leaf mould. See rhododendron cultivation for more detailed advice
PruningMinimal pruning required, see pruning group 8 (evergreens). Deadhead if practical, to promote vegetative growth rather than seed production
PropagationPropagate by semi-ripe cuttings in late summer, by layering in autumn, or by grafting in winter
Pest resistanceMay be susceptible to vine weevil, rhododendron and azalea whitefly, rhododendron leafhopper, Pieris lacebug, scale insects, caterpillars and aphids
Disease resistanceMay be susceptible to powdery mildews, honey fungus, silver leaf and Phytophthora, as well as more specific Rhododendron diseases