Rhododendron /ro.doˈdɛn.drɔn/
Common name: Azalea
Rhododendron is a large genus of flowering shrubs and small trees in the heath family, Ericaceae, which includes the plants commonly called azaleas. They produce showy clusters of funnel- or bell-shaped flowers in spring and are native to temperate regions across the Northern Hemisphere. Most species are evergreen or deciduous shrubs that prefer cool, moist, acidic conditions.
Care summary
Sun
Partial shade to dappled sun
Water
Keep evenly moist; do not let dry out
Soil
Acidic (pH 4.5–6), humus-rich, well-draining
Hardiness
Zones 4–8 (varies by species)
Mature height
0.5–6 m (2–20 ft), by species
Pet safe
Toxic to cats and dogs
Fun facts
- All parts of rhododendrons contain grayanotoxins, making the plants — and even honey made from their nectar — poisonous.
- The genus name comes from Greek words meaning 'rose tree'.
- The Rhododendron is the national flower of Nepal and the state flower of West Virginia and Washington.