Salvia x sylvestris 'Mainacht' (Wood sage)
'Mainacht' is a compact, upright perennial with oblong to lance-shaped, scalloped, wrinkled, hairy dark-green leaves and dense, terminal racemes of deep violet flowers in early summer.
Plant in light, moderately fertile, moist but well-drained soil. Grows best in full sun will tolerate part shade. Will reach a height of 0.5m and a spread of 0.5m after 2-5 years.