R. 'Calder'
Deciduous Azalea Hybrid
| Hybridized By | Hanger, F.E.W. |
| Azalea group | Knap Hill |
| Introduced | 1948 |
| 10 Year Height | 150 cm. (5ft.) |
| Bloom Time | ? |
| Flower | openly funnel-shaped |
| Flower Color | ? |
| Fragrance | ? |
| Leaves | ? |
| Leaf persistence | ? |
| Minimum Hardiness | ? |
| Registration | Unknown or not recorded |
