Woody > Rhododendron > Rhododendron 'Treasure'
Rhododendron
'Treasure'
Treasure Rhododendron
Mike's
Opinion
"
This evergreen specimen is an interesting upright shrub, the dark green foliage contrasts with the showy clusters of flowers making it stand out in the garden in spring. Resistant to deer and rabbits making it perfect for woodland gardens and mass planting.
Michael Pascoe, NDP., ODH., CLT., MSc. (Plant Conservation)
"
| Family |
| Ericaceae |
| Genus |
| Rhododendron |
| Cultivar |
| 'Treasure' |
| Category |
| Woody |
| Type |
| Shrub (evergreen) |
| USDA Hardiness Zone |
| 6 - 8 |
| Canadian Hardiness Zone |
| 5a - 8a |
| RHS Hardiness Zone |
| H4 - H7 |
| Temperature (°C) |
| -23 -(-7) |
| Temperature (°F) |
| -10 - 20 |
| Height |
| 1 - 2 m |
| Spread |
| 1 - 2 m |
Photographs
Description and Growing Information
Flowering Period
| General Description |
| A medium sized shrub with dark green evergreen foliage. Clusters of pink flowers contrast against the foliage during spring. |
| Landscape |
| An excellent addition to winter landscapes, woodland margins, foundation plantings, shade gardens, mixed borders, mass planting, and shrub borders. |
| Cultivation |
| Best grown in well drained acidic soil with the pH range of 4-6 and partial sun; mulch will assist greatly in retaining moisture so roots will not dry out. |
| Shape |
| A vigorous spreading plant, becoming an upright shrub over time. |
| Growth |
| Medium |
| ID Characteristic |
| An upright spreading shrub. Leaves are whorled, smooth and oval shaped. The bark is smooth and can range from chocolate-brown to grey. |
| Pests |
| Susceptible to many pests such as aphids, caterpillars, nematodes, scale, lace bugs, mealy bugs, borers, and white fly. Diseases include crown rot, leaf gall, rust, powdery mildew, blights, root rot, and leaf spot. Resistant to deer and rabbits. |
| Habitat |
| Horticultural origin. |
| Bark/Stem Description |
| Smooth bark that starts out chocolate-brown during new growth gradually turning grey as it matures. |
| Flower/Leaf Bud Description |
| Flower buds are large, glabrous green and underlined by white, pink, and light red. Cold winters may cause freezing and damage the buds, potentially reducing flower production. |
| Leaf Description |
| Dark green, medium sized oval shaped leaves. This dense spreading foliage maintains the same dark green colour year round. |
| Flower Description |
| 1-4 per cluster, flowers bloom in April-May in white, pink, and light red. |
| Colour Description |
| Foliage dark green, brownish-grey bark with white, pink and pale red flowers. |
| Texture Description |
| A medium-coarse textured plant. |
| Propagation |
| Grafting and layering, take short cuttings of mature new growth. Place in well drained moist soil, keep in high humidity and indirect light. |
| Ethnobotanical Uses (Disclaimer) |
| Rhododendron 'Treasure' is grown for its attractive flowers and evergreen foliage. Use for mass or group plantings or as a specimen plant. |
References
Reiley, H. (2004). Success With Rhododendrons and Azaleas (Rev. ed.). Portland: Timber Press.
Cullen, J., & Garden, E. (2005). Hardy Rhododendron Species: A Guide to iIdentification. Portland, Or.: Timber Press.
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