R. 'Holdrio'
Rhododendron Hybrid
| Hybridized By | Hachmann, Hans |
| Seed Parent | R. 'Kokardia X Hachmann's Diadem x Holger' |
| Pollen Parent | R. 'Sarasate' |
| 10 Year Height | ? |
| Bloom Time | ? |
| Flower | ? |
| Flower Color | ? |
| Fragrance | ? |
| Leaves | ? |
| Leaf persistence | ? |
| Minimum Hardiness | ? |
| Registration | Unregistered |
