American rosebay
Also known as: great laurel
A large evergreen shrub or small tree, usually up to about 3.5m high in cultivation, though can reach up to 10m in the wild. Leaves are elliptic, up to 20cm long, with fine rust-coloured felting on the undersides when young, and sparse hairs on the leaf stems. Late flowering, producing dense clusters of 14-25 small, bell-shaped flowers, in shades from white to lilac pink and with yellow-green speckles on the upper petals, in summer

Scientific classification
- Species
- American rosebay (Rhododendron maximum)
- Genus
- Rhododendron
- Family
- Ericaceae
- Harmful if eaten. Wear gloves and other protective equipment when handling
- Toxicity
- Shrubs
- Plant type
- 2.5-4 metres
- Height
- 2.5-4 metres
- Spread
- Evergreen
- Foliage
- Columnar upright
- Habit
- Spring · Summer · Autumn · Winter
- Season of interest
- Partial shade
- Sunlight
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- Ideal temperature
American rosebay pictures
Distribution of American rosebay
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 American rosebay
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American rosebay care guide
- Keep acidic root zone evenly moist, never leaving waterlogged soil
- Watering
- Partial shade
- Sunlight
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- Ideal temperature
Watering
Keep acidic root zone evenly moist, never leaving waterlogged soil
Fertilizing
Ericaceous fertilizer monthly from spring through late summer
Pruning
Usually little pruning is needed. Lightly shape if necessary, removing dead, damaged or diseased shoots. Prune after flowering.
Propagation
Propagate by semi-ripe cuttings in late summer, by layering in autumn, or by grafting in winter
Growing
Grow in moist but well-drained, humus rich, acidic soil, in partial or dappled shade. Choose a site away from frost pockets and sheltered from strong winds, and do not allow plants to dry out. Mulch annually, ideally with leaf mould. See rhododendron cultivation for more detailed advice
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Common pests and diseases
Diseases
May be susceptible to powdery mildews, honey fungus, silver leaf and Phytophthora, as well as more specific Rhododendron diseases
Pests
May be susceptible to vine weevil, rhododendron and azalea whitefly, rhododendron leafhopper, Pieris lacebug, scale insects, caterpillars and aphids
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