Retail nursery specialising in Perennials and Alpines all grown peat-free.
Introduced by Bill Wallis from his Nursery in Cambridgeshire. A good plant seeding itself around where it chooses, but never a pest. Short lived.
Deep purple flowers up to 30cm (12in) from June to September and growing 30cm (12in) wide. Happy in most garden soils in sun or light shade. Self seeds.