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

American rosebay

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
Information to be completed
Ideal temperature

American rosebay pictures

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Distribution of American rosebay

Distribution map

Eastern Northern America

Information to be completed

Culture

Information to be completed

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
Information to be completed
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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