Cultivars
'Alba'
This plant grows to 400mm (16in) tall and produces white flowers.
'Atropurpurea'
This plant grows to 400mm (16in) tall and produces rose-purple flowers.

'Creeping White'
This prostrate plant grows to 400mm (16in) tall and produces white flowers.

'Bicolor'
This plant grows to 350mm (14in) tall and produces profuse white, rose-purple to striped flowers that may occur on the same inflorescence.

'David Moss'
This plant grows to 400mm (16in) tall and produces white flowers.

'Porter's Variety'
This dwarf compact plant grows to 300mm (12in) tall and produces small rose-purple flowers.

'Praegerae'
This dwarf prostrate plant grows to 400mm (16in) tall and produces rich pink flowers.

'Waley's Red'
This plant grows to 350mm (16in) tall and produces magenta with a bluish-tinged flower.