R. 'Eighteenth of May'
Rhododendron Hybrid
| Synonyms | R. '18th of May' |
| Hybridized By | Clarke, George.W.. Portland Oregon, USA, 1971 |
| Seed Parent | R. 'Britannia' |
| Pollen Parent | R. 'Loderi King George' |
| 10 Year Height | 200 cm. (7ft.) |
| Bloom Time | midseason |
| Flower | funnel-shaped |
| Predominant Colour | ? |
| Leaves | narrowly oblong |
| Winter Foliage | ? |
| Hardiness | ? |
| Status | IRRC registered. |
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