Plants are notable for their sturdy, densely leafy stems and fragrant leaves. The most striking feature, however, is the spike-like inflorescence of dark blue-purple color, which is also very attractive to butterflies, bees, and other insects. It grows best in a sunny location, in permeable, rather light soil, where there is no long-term moisture stagnation. In the conditions of the Czech Republic, it is a relatively reliably winter-hardy species. Deeper frosts can be limiting as they may damage budding shoots. After planting, it usually lasts 3-5 years.
Habitat circle GR1 - forest edge with drier soil.