• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Rhododendron lindleyi

Lindley's rhododendron

Lindley's rhododendron

© RHS

  • Other common names Lindley's rhododendron

  • Family Ericaceae

  • 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

  • Details R. lindleyi is an evergreen shrub of rather lax habit, growing to around 1.5m tall and wide, with dark green leaves, up to 15cm long, that are glaucous and scaly on the undersides. Fragrant, funnel-shaped flowers, up to 10cm wide, open in clusters of 4-8 and are a creamy-white colour, often edged and tinged with pink and blotched orange or yellow at the base

  • Plant range Nepal, India, Bhutan, China (S Tibet)

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • Fragrance Flower

  • Hardiness

    Hardiness ratings

    All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

    • H1a - Under glass all year (>15C)
    • H1b - Can be grown outside in the summer (10 - 15)
    • H1c - Can be grown outside in the summer (5 - 10)
    • H2 - Tolerant of low temperatures, but not surviving being frozen (1 to 5)
    • H3 - Hardy in coastal and relatively mild parts of the UK (-5 to 1)
    • H4 - Hardy through most of the UK (-10 to -5)
    • H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)
    • H6 - Hardy in all of UK and northern Europe (-20 to -15)
    • H7 - Hardy in the severest European continental climates (< -20)

    H3

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Aspect South-facing or North-facing or West-facing or East-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilSand, Loam

  • pHAcid

Size

  • Ultimate height 1-1.5 metres

  • Ultimate spread 1-1.5 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grow in moist, well-drained, humus-rich, acid soil (ideally pH 4.5 to 5.5). Best grown in a cool greenhouse over much of the country, but will do well in the open in many gardens on the west coast of Scotland and in other parts of the Atlantic zone. See rhododendron cultivation

Propagation Propagate by seed or by semi-hardwood cuttings in late summer, layering in autumn or grafting in late summer or late winter

Suggested planting locations and garden types Patio & Container Plants

How to care

Pruning Pruning group 8

Pests Can get aphids, caterpillars, rhododendron leafhopper, scale insects and vine weevil

Diseases May be affected by powdery mildews, rhododendron bud blast and rhododendron petal blight. See Rhododendron diseases

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