Bushy, clump-forming perennial with soft, sage green hairy leaves and dense spikes of dark lilac flowers are produced for many weeks in in summer. Loved by bees. Sun
to the surface of a moist free draining seed compost. Lightly cover the seed and maintain at 15 to 18°c. Germination should take place in 21 to 28 days.
Best sown in: Spring