Native to Europe and temperate Asia , this herbaceous perennial has established itself over the centuries as a valuable medicinal plant . It is recognizable by its upright stems , its slightly puckered lanceolate leaves , and especially its purple-pink flowers in dense spikes that bloom from July to September .

Hardy and easy to grow, it prefers cool, slightly moist, well-drained soil in a sunny to partially shaded location. Its bushy, compact, and elegant habit makes it ideal for borders, light woodland areas, cool rock gardens, or at the base of shrubs . Generous yet discreet, it attracts a rich diversity of pollinators —bees, butterflies, hoverflies—thus strengthening the ecological resilience of the garden.

It self-seeds moderately without becoming invasive, and harmonizes easily with other perennials, bringing structure, color and tranquility to any growing space.