About
Rhododendron atlanticum (A), coastal azalea, is a semi-dwarf, deciduous azalea with blue-green, elliptic leaves. In mid to late spring, before the foliage, clusters of sweetly fragrant, funnel-shaped, white to pink-blushed flowers with protruding stamens are produced � a charming and fragrant native azalea for a sheltered, moist, acid-soil garden.
About the genus
Rhododendron are evergreen or deciduous shrubs and trees with simple leaves and funnel-shaped, bell-shaped or tubular flowers � solitary or in short racemes � in a vast range of colours. They include azaleas and are essential shrubs for sheltered, moist, acid-soil woodland gardens.
Growing conditions
SunlightFull sun, Partial shade
Soil typeClay, Loam, Sand
Soil pHAcid
Soil moistureMoist but well-drained
AspectEast-facing, North-facing, South-facing, West-facing
ExposureSheltered
UK hardinessH6
Plant details
Plant typeShrubs
HabitBushy
FoliageDeciduous
Height0.5-1 metres
Spread1-1.5 metres
Time to full height10-20 years
Suggested usesCity and courtyard gardens, Cottage and informal garden, Patio and container plants
Native toE USA
FragranceFlower
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, leafy, humus-rich acid soil in part shade with shelter; see rhododendron cultivation
PruningPruning group 1
PropagationPropagate by semi-ripe cuttings in late summer, layering in autumn or grafting in late summer or late winter
Pest resistanceMay be susceptible to vine weevil, rhododendron leafhopper, pieris lacebug, scale insects, caterpillars and aphids
Disease resistanceMay be susceptible to various Rhododendron diseases including powdery mildews, rhododendron petal blight, rhododendron bud blast, silver leaf and honey fungus