R. 'Helen Ring'
Rhododendron Hybrid
| Hybridized By | Kehr, A.E. |
| Seed Parent | R. maximum |
| Pollen Parent | R. arboreum ssp arboreum |
| Parentage Summary |
Seed parent is R. maximum; pollen parent is R. arboreum ssp arboreum. Additional parentage notes: () x (red flowered) |
| Introduced | 1968 |
| 10 Year Height | 250 cm. (8ft.) |
| Bloom Time | ? |
| Flower | openly funnel-shaped |
| Flower Color | ? |
| Fragrance | ? |
| Leaves | narrowly elliptic |
| Leaf persistence | ? |
| Additional Parentage Info |
() x (red flowered) |
| Minimum Hardiness | ? |
| Registration | Registered |