R. 'Sub Zero'
Rhododendron Hybrid
| Hybridized By | Van de Ven K. |
| Seed Parent | R. degronianum ssp yakushimanum |
| Pollen Parent | R. aberconwayi |
| Introduced | 1981 |
| 10 Year Height | 150 cm. (5ft.) |
| Bloom Time | late midseason |
| Flower | ? |
| Flower Color | ? |
| Leaves | ? |
| Winter Foliage | ? |
| Hardiness | ? |
| Status | IRRC registered. |