- Tub plant
- Solitary
- Mediterranean
- Hardy to -15 °C
| (also ssp. quadrangulosa) A handsome very blue species, new introduction and currently under observation, said to be reasonably hardy (till -15°C) and tolerating wet soil. Sometimes available. This plant can be found in the botanical garden in the following locations:
North-west border
| Max 10mClumping |
