RHODODENDRON
Scented Rhododendrons suitable for conservatory or cool greenhouse are marked with an asterisk.
Syn. Azalea.
Genus of more than 1000 species of evergreen and deciduous trees and shrubs from Europe, Asia, Australasia and North America, particularly southwestern China, Tibet, Burma, northern India and New Guinea.
Evergreen rhododendrons vary greatly in size and usually have bell-shaped flowers with 10 stamens.
Azaleas have smaller, thinner leaves and are generally medium-sized shrubs with smaller, funnel-shaped flowers with, usually, 5 stamens.
The problem rhododendron, vigorous hybrids of R. ponticum, which is colonizing large areas has been given the name R x superponticum and is subject to EU legislation under the "Invasive Alien Species Regulation".
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Evergreen - leathery, elliptic, dull green leaves to 12cm (5in) long
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Shades of pink - All shades of pink through to Carmine (red) - deep pink fading to pale
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Height - 1m (39in)
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Spread - 1m (39in)
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Dwarf shrub - Typically only grows to a maximum of one or two feet in height but there will be some exceptions. - produces dome-shaped trusses of 12-13 flowers, openly funnel-shaped to 8cm (3in) across
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Hardy - cold winter - Hardy in most places throughout the UK even in severe winters. May not withstand open/exposed sites or central/northern locations. Plant can withstand temperatures down to -15°C (5°F)
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Full sun - shelter from strong winds
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Partial shade
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Additional Features - Good to know - - R. 'Jean Marie de Montague' x R. degronianum ssp. yakushimanum
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Pests & Diseases - vine weevils, scale insects, honey fungus, powdery mildew, bud blast
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Place of origin - garden origin. 1969. USA. HA Schannen, New Jersey
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Hardiness - Fully hardy -
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Pruning group - Pruning group 5
Suitable for: Evergreen shrubs that require minimal pruning.
Action: Trim or lightly cut back shoots that spoil symmetry. Deadhead regularly.
When: Annually after flowering.
RHS group 8 -
Seasonal Interest - Spring -
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Soil Conditions - Fertile moist well-drained soil - - humus-rich
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Neutral to acid soil - ideally pH4.5-5.5
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Wildlife - Rabbit Resistant -
- Dead Heading
- Dead Heading - Video Tip ondemand_video
- Pruning
- Pruning - Video Tip ondemand_video
- Weed Killing
- Pests and Diseases
- Honey Fungus - Video Tip ondemand_video
- Further Reading
- Rhododendron genestrianum - Video Tip ondemand_video
- Scented Rhododendrons - Video Tip ondemand_video
- Planting out rhodies - Video Tip ondemand_video
- Five late flowering rhodies - Video Tip ondemand_video
- Rhododendron decorum (pink form) - Video Tip ondemand_video
- Rhododendron ‘Pink Polar Bear’ - Video Tip ondemand_video
- Growing from seed
- Rhododendron Seed Collecting - Video Tip ondemand_video
- Potting on Rhododendron seedlings - Video Tip ondemand_video
- Propagation by taking semi-ripe cuttings - Video Tip ondemand_video
- Growing from cuttings
- Propagation by layering - Video Tip ondemand_video
- Propagation by other means
- Making a hybrid - Video Tip ondemand_video
- Making a hairy or scaly cross - Video Tip ondemand_video
- Caerhays bred 'Red Centurian'
- When is the right time to collect seeds?
- When are seeds actually ripe and ready for collection?
- Magnolia seed collection - Video Tip ondemand_video
- Cornus capitata seed collection - Video Tip ondemand_video
- Rhododendron seed collecting - Video Tip ondemand_video
- Camellia seed collection - Video Tip ondemand_video
1m (39in)
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1m (39in) |
Buy Varieties of RHODODENDRON


RHODODENDRON calostrotum 'Gigha' >


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RHODODENDRON fortunei subsp. discolor >

RHODODENDRON lindleyi >


RHODODENDRON macabeanum >

RHODODENDRON oldhamii >
Commonly known as: Formosan azalea.

RHODODENDRON veitchianum Cubittii group >

RHODODENDRON 'Cornish Red' >
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