R. 'Joseph Haydn'
Azalea Hybrid
| Hybridized By | Vuyk van Nes |
| Azalea group | Vuykiana |
| Seed Parent | R. mucronatum var mucronatum |
| Pollen Parent | R. 'J.C. van Tol' |
| Introduced | 1938 |
| 10 Year Height | ? |
| Bloom Time | ? |
| Flower | ? |
| Predominant Colour | ? |
| Leaves | ? |
| Winter Foliage | ? |
| Hardiness | ? |