| Site of Special Scientific Interest | |
  Location within Wales | |
| Location | Ceredigion |
|---|---|
| Grid reference | SN5759272518 |
| Coordinates | 52°19′56″N4°05′29″W / 52.332214°N 4.0913744°W |
| Interest | Biological |
| Area | 1.73 ha |
| Notification | 29 December 1982 |
Rhos Blaen Carrog is a Site of Special Scientific Interest in Ceredigion, west Wales, due to its population of Wavy St. John's Wort (Hypericum undulatum), an extremely rare variety of St. John's Wort. [1]
