Rhododendron macabeanum × sinogrande
Botanical Information
| Family | Ericaceae |
| Genus | Rhododendron |
| Species | macabeanum × sinogrande |
| Category | Woody |
| Type | Shrub (evergreen) |
| Origin | Northeastern India. Introduced into United kingdom by Frank Kingdon-Ward (1885-1958) in 1928. |
Details
| USDA Hardiness Zone | 8b - 9a |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 8 |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H4 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -10 - (-5) |
| Temperature (°F) | 14 - 23 |
| Height | 15 m |
| Spread | 6 m |
| Growth | Medium |
| Flowering Period | April, May |
Description and Growing Information
| Landscape | Low maintenance architectural cottage and informal gardens. |
| Propagation | Semi-ripe cuttings in late summer, layering in autumn and grafting in late summer or winter. |
| Cultivation | Prefers partial-shade. Plant in moist but well-drained and slightly acidic soil. |
| Pests | Vine weevils, scale insects, honey fungus, powdery mildew, and bud blast. |
| Notable Specimens | Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom. |
| Leaf Description | Evergreen, heavily-veined leaves to 30 cm long, dark green above and felted grey-white beneath. |
| Flower Description | Large trusses of up to 30 trumpets. |
Photographs
Rhododendron macabeanum × sinogrande, form, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom.
Rhododendron macabeanum × sinogrande, flower, Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom.