Rhododendron rigidum
An evergreen shrub, usually to about 2m high in cultivation, though occasionally much taller in its native habitat. Leaves are elliptic, brownish when young, maturing to dark green with sparse yellow-brown scales on the undersides. Flowers are widely funnel-shaped, almost flat, and produced in loose clusters at the tips of the stems in mid to late spring, in shades of white, rose pink or lilac and sometimes with red flecks on the upper petals
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Size
Ultimate height
1.5–2.5 metresTime to ultimate height
5–10 yearsUltimate spread
1.5–2.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
AcidColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | White Pink Purple | Green Brown | ||
|---|---|---|---|---|
| Summer | Green Brown | |||
| Autumn | Green | |||
| Winter | Green |
Position
- Partial shade
Aspect
North–facing or West–facing
Exposure
Sheltered Hardiness
H5Botanical details
- Family
- Ericaceae
- Native to the UK
- No
- Foliage
- Evergreen
- Habit
- Columnar upright, Spreading branched
- Potentially harmful
- Harmful if eaten. Wear gloves and other protective equipment when handling
- 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
- Name status
Correct
- Plant range
- China (N Yunnan, SW Sichuan)
How to grow
Cultivation
Grow 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
Propagation
Propagate by semi-ripe cuttings in late summer, by layering in autumn, or by grafting in winter
Suggested planting locations and garden types
- City and courtyard gardens
- Cottage and informal garden
- Flower borders and beds
- Wall side borders
Pruning
Minimal pruning required, see pruning group 8 (evergreens)
Pests
May be susceptible to vine weevil, rhododendron and azalea whitefly, rhododendron leafhopper, Pieris lacebug, scale insects, caterpillars and aphids
Diseases
May be susceptible to powdery mildews, honey fungus, silver leaf and Phytophthora, as well as more specific Rhododendron diseases
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