A compact upright evergreen shrub with greyish green aromatic narrow leaves that are white underneath. Small blue flowers from mid to late spring and often again in autumn. Height and spread 2m (6ft).

Low growing evergreen shrub with greyish green aromatic narrow leaves that are white underneath. Forms large, dense prostrate mats that are ideal for draping sunny wall-tops. Small blue flowers in late spring. Height 15cm (6in). Needs sheltered site as not as hardy as other species in this genus.

A compact small evergreen shrub with broader grey green leaves that other species. Bright coloured deep blue flowers in late spring and often again in winter. Height and spread 1m (3ft).