Rhododendron keysii
| Family |
| Ericaceae |
| Genus |
| Rhododendron |
| Species |
| keysii |
| Category |
| Woody |
| Type |
| Shrub (evergreen) |
| USDA Hardiness Zone |
| 6b - 7a |
| Canadian Hardiness Zone |
| 8 |
| RHS Hardiness Zone |
| H6 |
| Temperature (°C) |
| -32 |
| Temperature (°F) |
| -25 |
| Height |
| 1 – 4 m |
| Cultivation |
| Grow best in moist, fertile, well-drained loams in full sun to part shade. Best flowering occurs in full sun. |
| Shape |
| Sprawling to mounding. |
| Pests |
| Vine weevils, scale insects, honey fungus, powdery mildew, and bud blast. |
| 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. |
| Notable Specimens |
| Caerhays Castle, Goran, Cornwall, United Kingdom. |
| Propagation |
| Propagate by semi-ripe cuttings in late summer, layering in autumn or grafting in late summer or late winter. |