Perovskia belongs to the Lamiaceae family. Superba, in particular, is a semi-woody plant, its shoots are covered with a floury down, and should be cut back completely each year. Its deciduous foliage is silvery-white and its flowers are lavender-blue. It is suitable for all soil types, even very dry soils, and can be grown as a specimen or in groups with shrubs, perennials or annuals.