Hardy and reliable plant which will flower year after year over a very long season. A dwarf variety, Purrsian Blue will grow to 45cm high and wide, making it perfect for edges & borders with aromatic small grey foliage. spikes of periwinkle blue flowers in profusion in summer. Likes any well drained but moist soil and will give a second flush of flowers if cut back lightly when the first flush is spent. Cut back hard in autumn and the plant will re grow vigorously. Large clumps may be divided in spring.