R. 'Whopper'
Rhododendron Hybrid
| Hybridized By | Lem Halfdan |
| Seed Parent | R. 'Lem's Goal' |
| Pollen Parent | R. 'Loderi King George' |
| Introduced | 1960 |
| 10 Year Height | 200 cm. (7ft.) |
| Bloom Time | late midseason |
| Flower | broadly funnel-shaped |
| Predominant Colour | ? |
| Leaves | narrowly oblong |
| Winter Foliage | ? |
| Hardiness | ? |
| Status | IRRC registered. |