| Propagation | Root cuttings collected in the autumn and cut into 5 cm lengths and placed horizontally in flats barley covering the top. Water and place in a cold frame until growth appears and then pot individually. |
| Cultivation | Grows in average, well-drained soil in full sunlight. Can withstand poor soil conditions. |
| Pests | Aphids and powdery mildew. |
| Notable Specimens | The Gardens of Fanshawe College (D Courtyard), London, Ontario, Canada. |
| Habitat | Horticultural origin. |
| Leaf Description | Coarse, dark-grey leaves. |
| Flower Description | Golf ball shaped, dark blue to purple flowers made up of dozens of small stamens atop of erect stems. |
