Woody > Rhododendron > Rhododendron 'Shilsonii'
Rhododendron
'Shilsonii'
Shilsonii Rhododendron
Origin: Parentage: Rhododendron barbatum × Rhododendron thomsonii.
| Family |
| Ericaceae |
| Genus |
| Rhododendron |
| Cultivar |
| 'Shilsonii' |
| Category |
| Woody |
| Type |
| Tree (evergreen), Shrub (evergreen) |
| USDA Hardiness Zone |
| 6 - 8 |
| Canadian Hardiness Zone |
| 6a - 8a |
| RHS Hardiness Zone |
| H4 - H7 |
| Temperature (°C) |
| -23 -(-7) |
| Temperature (°F) |
| -10 - 20 |
| Height |
| 3 - 4 m |
Photographs
Description and Growing Information
Flowering Period
| General Description |
| Rhododendron 'Shilsonii' is grown for its attractive flowers and evergreen foliage. |
| Landscape |
| An excellent addition to winter landscapes, woodland margins, foundation plantings, shade gardens, mixed borders, mass planting, and shrub borders. Use for mass or group plantings or as a specimen plant. |
| 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 |
| Large, open-branched shrubs or small trees |
| 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. |
| Bark/Stem Description |
| An exfoliating bark that is pale and waxy as it ages, curling up to expose mahogany red under-bark. |
| Leaf Description |
| Broad, elliptic, bright green leaves with down-turned margins, and are up to about 15 cm long. |
| Flower Description |
| 1-4 per cluster, blood-red flowers. |
| Notable Specimens |
| Trengwainton Garden, Madron, near Penzance, Cornwall, United Kingdom. |
| Propagation |
| Grafting and layering, take short cuttings of mature new growth. Place in well drained moist soil, keep in high humidity and indirect light. |
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