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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".
Further Reading....
- Details
- Mature Size
- Tips and Advice
- Goes Well With
- Planting Combinations
- Other Suggestions
- See Also...
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Evergreen - neat, elliptic-obovate, hairless, dark-green leaves 3-9cm (1¼-3½in) long with a metallic grey-green sheen.
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Height - 1.2-1.5m (4-5ft) -
Spread - 1.2-1.5m (4-5ft)
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Medium shrub - Typically grow to around 4-6 feet in height - vigorous, erect shrub. Produces pendent, narrowly tubular-bell-shaped, waxy flowers 2.5-3.5cm (1-1½in) long in loose trusses of 5-10 flowers .
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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) -
Full sun - shelter from strong winds -
Partial shade -
Additional Features - Good to know - - Slow grower, ultimately to 4m (13ft) -
Pests & Diseases - vine weevils, whiteflies, scale insects, caterpillars, aphids, honey fungus, powdery mildew, bud blast. -
Place of origin - eastern India, Bhutan, Tibet, China -
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 -
Scented Plants - Scented foliage - - aromatic leaves
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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
Cold weather damage to evergreen plants
Rhododendron - Care Guide
- 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
- General Pictures
- Further Reading
- Planting out rhodies - Video Tip ondemand_video
Rhododendron - Propagation
- 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'
Rhododendron - Video Spotlights
- R. augustinii, edgeworthii x leucaspis, 'Anne Teese', loderi 'King George' - Video Tip ondemand_video
- Rhododendron cilpinense - Video Tip ondemand_video
- Rhododendron decorum (pink form) - Video Tip ondemand_video
- Rhododendron genestrianum - Video Tip ondemand_video
- Five late flowering rhodies - Video Tip ondemand_video
- R. niveum - Video Tip ondemand_video
- Rhododendron ‘Pink Polar Bear’ - Video Tip ondemand_video
- Scented Rhododendrons - Video Tip ondemand_video
Shrubs and Trees - Seeds - 1) Collecting Seeds
- 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
Shrubs and Trees - Seeds - 2) Storing Seeds
Shrubs and Trees - Seeds - 3) Planting Seeds
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1.2-1.5m (4-5ft)
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1.2-1.5m (4-5ft) |
Buy Varieties of RHODODENDRON
RHODODENDRON bureavii >
Very attractive rich red furry indumentum on the undersides of the leaves is the key feature of this unusual and rare species. Flowers rose
RHODODENDRON calostrotum 'Gigha' >
Dwarf evergreen with dense, brown scales beneath leaves. Rose-purple flowers
RHODODENDRON edgeworthii >
White flowers tinged pink with a rich scent. Bullate leaves with fawn indumentum
RHODODENDRON formosum >
Semi-dwarf rhododendron. (Syn. Gibsonii) - white striped pink,lightly scented
RHODODENDRON fortunei subsp. discolor >
Late flowering with large trusses of fragrant white or pinkish flowers
RHODODENDRON lindleyi >
A straggly upright habit but one of the most beautiful and scented rhododendrons when in flower. Pure white in trusses of 3 or 5 flowers
RHODODENDRON macabeanum >
Leaves up to a foot long and huge trusses of bell-shaped pale yellow flowers with purple blotches
RHODODENDRON oldhamii >
Commonly known as: Formosan azalea.
Hairy young shoots on this azalea-like species and brick red flowers
RHODODENDRON sinogrande >
The largest leafed rhododendron of all with huge trusses of yellow fading to creamy-white flower with a crimson blush
RHODODENDRON 'Cornish Red' >
The tallest growing of all the Cornish woodland rhododendrons. Can reach 60-80 feet in maturity with large trusses of reddish-purple flowers
Useful extras...
Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00
Fertilisers & Feeds - Empathy
Rootgrow Ericoid mycorrhizal fungi
This specially adapted Rootgrow™ mycorrhizal fungi will boost the growth of acid-loving plants like rhododendrons, azaleas, heathers and blueberries.
It contains ericoid and arbuscular mycorrhizal fungi, which are found in poor acidic soils where ericaceous plants naturally grow.
Only £7.50
Fertilisers & Feeds - Empathy
Ericaceous Liquid Seaweed Fertiliser
Specially developed organic concentrated seaweed feed for ericaceous plants that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants,
Perfect used in conjunction with Rootgrow™ Ericoid.
Only £7.50
Garden Goodies
Slate Plant Labels
These wonderfully tactile natural slate plant labels are hand made in Cornwall and come with a chalk pen.
Just stick them in your pot or border. Pack of 6.
Only £10.20
Garden Goodies
Slate Tie-on Plant Labels
Hand made in Cornwall, these delightful natural slate labels are perfect for pots.
Comes with chalk pen. Pack of 5
Only £10.20
