Perovskia atripl. 'Blue Spire'

Perovskia "Blue Spire", also called blue spirea, is a remarkable, deciduous shrub, with an upright habit and beautiful, lavender to blue flowers, in narrow cobs of tubular flowers. The leaves are grey-green, coarsely toothed and fragrant when crushed. Perovskia likes a sunny position in a pH neutral to calcareous, well-drained soil. It requires a firm pruning every autumn to 30 cm from the ground and a winter protective layer of leaves. Blue spirea is moderately to fairly hardy, disease and drought resistant, sea wind tolerant, pest free and can also handle some air pollution. The plant will need some support during the full summer.