Polemonium caeruleum
Jacob's Ladder or Greek Valerian
| Family | 
| Polemoniaceae | 
| Genus | 
| Polemonium | 
| Species | 
| caeruleum | 
| Category | 
| Perennials | 
| USDA Hardiness Zone | 
| 3-7 | 
| Height | 
| 45 -60 cm | 
| Spread | 
| 45 -60 cm | 
| Growth | 
| Fast | 
| Habitat | 
| Can be found in damp grasslands, meadows, woodlands and rocky areas in Europe. | 
| Notable Specimens | 
| The A. M. (Mac) Cuddy Gardens, Strathroy, Ontario, Canada. |