Cultivar
'Citriodora'
This spreading perennial grows to 250mm (10in) tall by 800mm (34in) wide forming a compact mound habit. The small mid green leaves when touched or crushed give off a citronella-like aroma and the small blue flowers appear in upright spikes throughout summer. 

It is used as a ground cover or container specimen preferring an open sunny position. It grows in most well drained moderately fertile moist soils and once established this plant has a low water requirement. (Scale: 1-drop from 3) It may be pruned after flowering to encourage a second flush.