R. 'Joan Marie'
Rhododendron Hybrid
| Hybridized By | Cowles, J.C. |
| Introduced | 1960 |
| 10 Year Height | 200 cm. (7ft.) |
| Bloom Time | midseason |
| Flower | broadly funnel-shaped |
| Flower Color | ? |
| Fragrance | ? |
| Leaves | elliptic |
| Leaf persistence | ? |
| Minimum Hardiness | -15 C (5 F) |
| Additional Hardiness Info |
H5 |
| Registration | Registered |