swamp azalea
Also known as: swamp honeysuckle; white swamp honeysuckle
R. viscosum is a bushy deciduous shrub to 2.5m tall, with dark leaves glaucous beneath. Very fragrant, narrowly funnel-shaped white flowers, up to 4cm wide, flushed deep pink on the tube, open in early to mid summer
Scientific classification
- Species
- swamp azalea (Rhododendron viscosum)
- Genus
- Rhododendron
- Family
- Ericaceae
- Harmful if eaten. Wear gloves and other protective equipment when handling
- Toxicity
- Shrubs
- Plant type
- 1.5-2.5 metres
- Height
- 1.5-2.5 metres
- Spread
- Deciduous
- Foliage
- Bushy
- Habit
- Spring · Summer
- Season of interest
- Full sun · Partial shade
- Sunlight
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- Ideal temperature
swamp azalea pictures
Distribution of swamp azalea
Distribution map
Eastern Northern America
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Culture
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Toxicity
Harmful if eaten. Wear gloves and other protective equipment when handling
Quick identification of swamp azalea
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swamp azalea care guide
- Keep acidic root zone evenly moist, never leaving waterlogged soil
- Watering
- Full sun · Partial shade
- Sunlight
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- Ideal temperature
Watering
Keep acidic root zone evenly moist, never leaving waterlogged soil
Fertilizing
FertilizingEricaceous fertilizer monthly from spring through late summer
Pruning
PruningLittle pruning is needed. Remove diseased, damaged, crowded or crossing shoots and unwanted growth. Timing depends on the plant: generally late winter or early spring; plants prone to bleeding and deciduous magnolias need different timing, and deciduous azaleas and lilacs are pruned after flowering.
Propagation
PropagationPropagate by seed when ripe, or semi-ripe cuttings in late summer, layering in autumn or grafting in late summer or late winter
Growing
GrowingGrow in moist but well-drained, leafy, humus-rich acid soil in part shade with shelter; sun tolerant if soil remains reliably moist; see rhododendron cultivation
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Common pests and diseases
Diseases
May be susceptible to various Rhododendron diseases including powdery mildews, rhododendron petal blight, rhododendron bud blast, silver leaf and honey fungus
Pests
May be susceptible to vine weevil, rhododendron and azalea whitefly, rhododendron leafhopper, pieris lacebug, scale insects, caterpillars and aphids
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