Perovskia abrotanoides – Russian Sage
Habit: Many shoots, upright semi-shrub to small shrub, 1-1.5 m tall and wide, not many twigs, shoots have grey-white hairs.
Flowers: Purple-blue spikes, persistent in late summer from August to October, aromatic, lavender-like scent; impressive summer-flowers.
Leaves: Small, grey-green to white tomentose, pinnate, strongly aromatic.
Demands: Full sun, not tolerant of shade, heat resistant, needs warmth, often freezes down to the ground but regenerates well.
Soil: Well drained, dry to fresh, chalky substrates; sensitive to dampness; shoots losing their strength on heavy soil.
Note: Cover root base (e.g. with leaves) in colder regions in autumn; cut in spring down to 10 cm from the ground.
Hardiness: Zone 6b