Nepeta racemosa 'Walker's Low' (9cm)

Catmint. With its blue-mauve flowers and aromatic foliage, this perennial makes an excellent groundcover for a sunny border or edge of path. Clip back after the first flush and it will flower into early autumn. Height 60cm. Spread 50cm. Full sun/partial shade. Moist but welldrained soil. Hardy. RHS Award of Garden Merit.