R. 'Grape Jam'
Rhododendron Hybrid
| Hybridized By | Delp Weldon E. |
| Seed Parent | R. minus Carolinianum Group 'Achiever' |
| Pollen Parent | R. fastigiatum |
| Introduced | 1974 |
| 10 Year Height | 100 cm. (3ft.) |
| Bloom Time | midseason |
| Flower | openly funnel-shaped |
| Predominant Colour | ? |
| Leaves | ? |
| Winter Foliage | ? |
| Hardiness | ? |
| Status | IRRC registered. |