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Scented Rhododendrons suitable for conservatory or cool greenhouse are marked with an asterisk.
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".
Pests & Diseases - vine weevils, scale insects, honey fungus, powdery mildew, bud blast.
Place of Origin - garden origin. Canada. 1976. JG Lofthouse, Vancouver, British Columbia
Height - 1.2m (4ft)
Spread - 1.2m (4ft)
Dwarf shrub - Typically only grows to a maximum of one or two feet in height but there will be some exceptions. - flat trusses of 9-11 flowers.
Evergreen - yellow-green leaves to 10cm (4in) long.
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)
Fertile moist well-drained soil - humus-rich
Neutral to acid soil - ideally pH 4.5-5.5.
Full sun - shelter from strong winds.
- Dead Heading
- Dead Heading - Video Tip ondemand_video
- Pruning - Video Tip ondemand_video
- Weed Killing
- Pests and Diseases
- Honey Fungus - Video Tip ondemand_video
- Further Reading
- Growing from seed
- 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'