Retail nursery specialising in Perennials and Alpines all grown peat-free.
A compact form of the species that covers itself with flowers for up to three months. Attractive to bees and butterflies. Will seed itself modestly. Can be short lived.
Violet blue flowers up to 15cm (6in) from June to August and growing 30cm (12in) wide. Prefers well drained soil in full sun.