R. 'Cos'
Rhododendron Hybrid
| Hybridized By | Sunningdale Nursery |
| Seed Parent | R. decorum ssp decorum |
| Pollen Parent | R. 'Vanessa Group' |
| Introduced | 1955 |
| 10 Year Height | ? |
| Bloom Time | ? |
| Flower | ? |
| Flower Color | ? |
| Fragrance | ? |
| Leaves | ? |
| Leaf persistence | ? |
| Plant Hardiness | ? |
| Flower Bud Hardiness |
? |
| Registration | Registered |