Rhododendron keysii
Botanical Information
| Family | Ericaceae |
| Genus | Rhododendron |
| Species | keysii |
| Category | Woody |
| Type | Shrub (evergreen) |
| Origin | Native to northeastern India, Bhutan, Sikkim, and southern Tibet. |
Details
| USDA Hardiness Zone | 6b - 7a |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 8 |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H6 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -32 |
| Temperature (°F) | -25 |
| Height | 1 – 4 m |
| Flowering Period | April, May |
Description and Growing Information
| Shape | Sprawling to mounding. |
| Propagation | Propagate by semi-ripe cuttings in late summer, layering in autumn or grafting in late summer or late winter. |
| Cultivation | Grow best in moist, fertile, well-drained loams in full sun to part shade. Best flowering occurs in full sun. |
| Pests | Vine weevils, scale insects, honey fungus, powdery mildew, and bud blast. |
| Notable Specimens | Caerhays Castle, Goran, Cornwall, United Kingdom. |
| Bark/Stem Description | Dark brown-grey, mild fissures can be found on older growth. |
| Leaf Description | Narrow dark green leaves that are lanceolate-elliptic or lanceolate-oblong in shape, and typically 4 –8 × 1 –3 cm in size. |
| Flower Description | Narrow tubular in shape and orange to reddish in colour with yellow or green lobes. |
Photographs
Rhododendron keysii, form, Caerhays Castle, Goran, Cornwall, United Kingdom.
Rhododendron keysii, leaf, Caerhays Castle, Goran, Cornwall, United Kingdom.
Rhododendron keysii, flower, Caerhays Castle, Goran, Cornwall, United Kingdom.