| Scientific Name: | Polemonium caeruleum |
| Common Name: | Jacob's ladder |
| Family Name: | Polemoniaceae |
| Origin: | Europe |
| Hardiness Zone: | Zone 3: (-40 to -34 °C) |
| Plant Type: | Herbaceous perennial |
| Mature Size: | 0.4 - 0.7m x 0.3 - 0.6m (height x width) |
| Habit: | Upright |
| Form: | Oval - vertical |
| Texture: | Medium - fine |
| Landscape Uses: | Attract beneficial insects, Container planting, Cut flower or foliage, Medicinal plant, Perennial border, Rock garden |
| Exposure: | Full sun only if soil kept moist, Part sun/part shade |
| Soil or Media: | Well-drained |
| Leaves: | Compound, Alternate, Soft flexible, Glabrous, Odd-pinnate, Ovate, Entire |
| Flowers: | Cyme, White, Blue, Purple, May-Jun-Jul |
| Fruit: | Capsule, Green, Brown, Jul-Aug |
| Key ID Features: | |
| Leaves odd-pinnately compound, 10-25cm long x 4-7cm wide, most leaflets 1-3cm long x 5-9mm wide, margins entire, alternate along the rachis (reminiscent of ladders); flowers usually deep blue in terminal cymes. | |