Large (up to 5cm across), saucer-shaped, violet-blue flowers with white centres appear throughout the summer above the mounds of slightly-marbled, deep green foliage. Perfect for underplanting roses, or filling a few gaps in the front of a border, it copes well in full sun or partial shade.
This perennial dies back to below ground level each year in autumn, then fresh new growth appears again in spring.
Winner of the RHS Plant of the Centenary at Chelsea Flower Show 2013
- Enjoys full sun or partial shade
- Fertile, well-drained soil
- Flowering period: June to September
- Fully hardy
- In midsummer rejuvenate plants that are beginning to look jaded, by removing old flowered stems and leaves.