Cultivars
'Phyllis Fancy'
This perennial produces dark mauve calyx with white petals, otherwise it is the same as the species.

'Santa Barbara'
This dwarf plant grows to 1m (36in) tall and wide with silver-green foliage and produces velvety purple flowers that appear from spring to autumn. 

It is used in patio pots or in perennial borders for cottage gardens and grows in full sun tolerating most well drained soils. It is drought tolerant and has a low water requirement once established (Scale: 1-drop from 3) it also responds to mulching and an occasional deep watering during dry periods.