R. 'Gretia'
Rhododendron Hybrid
| Hybridized By | Aberconway, Lord |
| Seed Parent | R. 'Portia Group' |
| Pollen Parent | R. griersonianum |
| Introduced | 1936 |
| 10 Year Height | ? |
| Bloom Time | ? |
| Flower | ? |
| Predominant Colour | ? |
| Leaves | elliptic |
| Winter Foliage | ? |
| Hardiness | ? |
| Status | IRRC registered. |