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".

Garden location should have suitably acidic soil.

Full Plant Details - Sun/Soil & other attributes - Click to close

Burncoose speciality
See Burncoose Speciality group for more details
Good to know
R. griersonianum x R. auriculatum. Shallow planting is essential. Improved by pruning
Pests & Diseases
Vine weevils, scale, honey fungus, powdery mildew, bud blast
Place of origin
Garden origin
Rhododendrons
Rhododendron
Evergreen
Narrow, sharply pointed leaves to 18cm (7in) long, covered with dense, short hairs
Trumpet
Fully hardy
Entire
Elliptic
Oblong
Height
10m (33ft)
Spread
10m (33ft)
Tall Shrub
Open, leggy habit. Produces openly funnel-shaped flowers to 11.5cm (4½in) across in loose trusses of about 14
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.
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)
Spring Seasonal Interest
Summer Seasonal Interest
Acid / ericaceous loving
Ideally pH 4.5-6.0
Fertile moist well-drained soil
Humus-rich
Neutral to acid soil
Full sun
Shelter from strong winds
Partial shade
harmful if eaten
People and pets, i.e. cats, dogs, rabbits, rodents, tortoises
Rabbit Resistant

Mature Size

10m (33ft)
	10m (33ft)

View Planting Tips and Care Advice

Rhododendron - Care Guide

Rhododendron - Propagation

Rhododendron - Video Spotlights

Search Caerhays Garden Diary for more info & pictures

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MAGNOLIA sargentiana var robusta and RHODODENDRON

RHODODENDRON 'Bert's Own'

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Semi-dwarf rhododendron. (Syn. Gibsonii) - white striped pink,lightly scented

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RHODODENDRON 'Fragrantissimum'

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Available late spring to early summer 2025
Spring according to the Met Office is defined as March 1st - May 31st. Therefore late spring is mid-April onwards. This is not a guaranteed date but an estimate and subject to availability.

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Available again from APRIL 2025
When fresh stock arrives