Rhododendron williamsianum (Williams Rhododendron)
Botanical Information
| Family | Ericaceae |
| Genus | Rhododendron |
| Species | williamsianum |
| Category | Woody |
| Type | Shrub (evergreen) |
| Origin | Southwest China. |
Details
| USDA Hardiness Zone | 7b - 8a |
| USDA Hardiness Ref. | |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H5 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -15 |
| Temperature (°F) | -5 |
| Height | 1 m - 1.5 m |
| Spread | 1 m - 1.5 m |
| Growth | Medium |
| Flowering Period | April, May |
Description and Growing Information
| General Description | A compact, small-spreading large shrub or small tree. |
| Shape | Compact. |
| Landscape | City and urban courtyards and gardens, as a groundcover and in informal gardens. |
| Propagation | By seed, semi-hardwood cuttings, layering or grafting. |
| Cultivation | Grow under partial shade in moist but well-drained, humus-rich acidic soil. Plant shallowly as deep planting may prove fatal over time. |
| Pests | Caterpillars, aphids, vine weevil, leafhoppers, lacebugs and scales. May be susceptible to rhododendron petal blight, rhododendron bud blast, powdery mildews and silver leaf. |
| Notable Specimens | University of British Columbia Botanical Garden, Vancouver, British Columbia, Canada. National Trust Trelissick Garden, Feock, near Truro, Cornwall, United Kingdom. |
| Flower/Leaf Bud Description | Small buds with 2 - 3 scales. |
| Leaf Description | Round-ovate simple leaves with a slight spade-shape and defined venation. |
| Flower Description | Tubular funnel-shaped flowers that either grow solitarily or in short racemes. |
| Colour Description | Reddish-brown branches and bark. Bright green foliage with pastel green venation. Light blush pink inflorescences. Reddish-brown buds. |
Photographs
Rhododendron williamsianum, form.
Rhododendron williamsianum, leaf.
.jpg "Rhododendron williamsianum, flower, University of British Columbia Botanical Garden, Vancouver, British Columbia, Canada.")
Rhododendron williamsianum, flower, University of British Columbia Botanical Garden, Vancouver, British Columbia, Canada.
Rhododendron williamsianum, form, University of British Columbia Botanical Garden, Vancouver, British Columbia, Canada.
Rhododendron williamsianum, form, National Trust Trelissick Garden, Feock, near Truro, Cornwall, United Kingdom.
Rhododendron williamsianum, leaf, National Trust Trelissick Garden, Feock, near Truro, Cornwall, United Kingdom.
Rhododendron williamsianum, flower, National Trust Trelissick Garden, Feock, near Truro, Cornwall, United Kingdom.
Rhododendron williamsianum, flower, National Trust Trelissick Garden, Feock, near Truro, Cornwall, United Kingdom.
Rhododendron williamsianum, flower bud, National Trust Trelissick Garden, Feock, near Truro, Cornwall, United Kingdom.
Awards
