R. 'Grandiflorum Plenum'
Rhododendron Hybrid
| Hybridized By | Dalibon |
| Seed Parent | R. ponticum |
| Pollen Parent | ? |
| Introduced | 1845 |
| 10 Year Height | ? |
| Bloom Time | ? |
| Flower | ? |
| Predominant Colour | ? |
| Leaves | lanceolate |
| Winter Foliage | ? |
| Hardiness | ? |
| Status | IRRC registered. |