About
Rhododendron saxifragoides is a slow-growing, cushion-forming tender vireya shrub to 15 cm with small, narrow, glossy dark-green leaves. Tubular to trumpet-shaped, red or pink flowers are produced singly or in pairs on short stems. Though challenging to grow, this species has contributed to many successful hybrid cultivars. A specialist plant for a heated greenhouse.
About the genus
Rhododendron, one of the largest and most diverse shrub genera, includes evergreen and deciduous species and hybrids ranging from dwarf alpines to large trees, all preferring moist, well-drained, acidic soil in sheltered positions with dappled shade or full sun.
Growing conditions
SunlightFull sun, Partial shade
Soil typeLoam
Soil pHAcid
Soil moistureMoist but well-drained, Poorly-drained
AspectSouth-facing, East-facing
ExposureExposed, Sheltered
UK hardinessH1B
Plant details
Plant typeShrubs, Alpine Rockery
HabitMatforming
FoliageEvergreen
Height0.1-0.5 metres
Spread0.1-0.5 metres
Time to full height5-10 years
Suggested usesSpecimen planting, large borders, parkland settings.
Native toNew Guinea
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 under glass, in a greenhouse or conservatory in an ericaceous (lime-free) potting mix that holds moisture well. Position in bright, filtered light, keeping temperatures as consistent as possible, and always above 8°C and below 25°C. Keep moist; in its natural environment this plant grows in boggy conditions. Maintain high levels of humidity but ensure air circulation to minimise fungal problems. See rhododendron cultivation for more detailed advice
PruningNo pruning required
PropagationPropagate by seed, by semi-ripe cuttings or by layering
Pest resistanceMay be susceptible to aphids, mealybugs, scale insects and vine weevil
Disease resistanceMay be susceptible to powdery mildews, rust diseases, honey fungus and Phytophthora