Rhododendron 'Duke of Cornwall' (Duke of Cornwall Rhododendron)
Botanical Information
Family | Ericaceae |
Genus | Rhododendron |
Cultivar | 'Duke of Cornwall' |
Type | Shrub (evergreen) |
Origin | Horticultural origin (Hybridiser: Gill, Richards & Sons. Penryn, Cornwall, England). |
Details
USDA Hardiness Zone | 7 - 9 |
USDA Hardiness Ref. | |
Canadian Hardiness Zone | Requires cold season protection under glass. |
Canada Hardiness Ref. | |
RHS Hardiness Zone | H4 |
RHS Hardiness Ref. | |
Height | 8-12 m |
Spread | 2.5-4 m |
Growth | Medium |
Flowering Period | March, April |
Description and Growing Information
General Description | An upright, vigorous evergreen shrub, bearing large dome-shaped trusses of bright crimson flowers and conspicuously veined green leaf. |
Shape | A large dome-shaped. |
Landscape | Informal hedge. Will provide a beautiful display of bright crimson flowers which are very appealing. |
Propagation | Propagate by seed when ripe, or semi-ripe cuttings in late summer, layering in autumn or grafting in late summer or late winter. |
Cultivation | Grow in moist but well-drained, leafy, humus-rich acid soil in part shade with shelter. |
Pests | Potential insects include vine weevil, rhododendron leafhopper, pieris lacebug, scale insects, caterpillars and aphids. Potential diseases include powdery mildews, rhododendron petal blight, rhododendron bud blast, silver leaf and honey fungus |
Notable Specimens | Caerhays Castle, Goran, Cornwall, United Kingdom. |
Bark/Stem Description | Dark brown-grey. |
Leaf Description | Thick, glabrous, simple leaves in a lanceolate/elliptical shape, leathery texture, 6-18 cm long and 2-5 cm wide, growing in a whorled pattern. Dark green above, light green underneath. |
Flower Description | Funnel campanulate, 2.5 5 cm long, bright crimson colour, outside scaly, sometimes fragrant. Truss holds 4-6 flowers. |
Photographs
Rhododendron 'Duke of Cornwall', form, Caerhays Castle, Goran, Cornwall, United Kingdom.
Rhododendron 'Duke of Cornwall', leaf, Caerhays Castle, Goran, Cornwall, United Kingdom.
Rhododendron 'Duke of Cornwall', flower, Caerhays Castle, Goran, Cornwall, United Kingdom.
Rhododendron 'Duke of Cornwall', form, Caerhays Castle, Goran, Cornwall, United Kingdom.