Rhododendron arboreum (Tree Rhododendron)
Botanical Information
| Family | Ericaceae |
| Genus | Rhododendron |
| Species | arboreum |
| Category | Woody |
| Type | Shrub (evergreen) |
| Origin | Native to Bhutan, China, India, Myanmar, Nepal, Sri Lanka, Pakistan and Thailand. |
Details
| USDA Hardiness Zone | 7b - 8a |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 8 |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H4-H5 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -17.8-(-6.7) |
| Temperature (°F) | 0-20 |
| Height | 8-12 m |
| Spread | 2-4 m |
| Flowering Period | March, April, May, June |
Description and Growing Information
| General Description | In 1993 this tree was discovered on Mount Japfu in India. The tree holds the Guinness Record for the tallest Rhododendron at 32 metres. It was measured at the time of discovery but is still growing. |
| Propagation | Propagated by seed. |
| Cultivation | Grows best in well drained, moist soils and partial sun. |
| Notable Specimens | Trewidden Garden, Cornwall, England. Lanhydrock House and Garden, Bodmin, Cornwall, United Kingdom. |
| Habitat | Found in various altitudes and in dense forest areas. |
| Leaf Description | The broad, dark green leaves are 10-20 cm long. The underside of the leaves are silvery. |
| Flower Description | In the spring 15-20 bell-shaped flowers grow, reaching 5-6 cm long and 5 cm wide. They are dark pink to ruby red. |
Photographs
Rhododdendron arboreum, form. Lanhydrock House and Garden, Bodmin, Cornwall, United Kingdom.
Rhododdendron arboreum, flower. Lanhydrock House and Garden, Bodmin, Cornwall, United Kingdom.
Rhododdendron arboreum, leaf. Lanhydrock House and Garden, Bodmin, Cornwall, United Kingdom.
Rhododdendron arboreum, bark. Lanhydrock House and Garden, Bodmin, Cornwall, United Kingdom.
