Cultivars
'Ballerina'
This small plant reaches 600mm (24in) tall and has double white flowers with white ray-florets that fade to grey. It is an excellent small rockery plant.

'Boule de Neige', syn. 'Schneeball'
This plant grows to 600mm (24in) tall and has double white flowers.

'Perry's White'
This plant grows to 1000mm (39in) tall and has large double white flowers.

'The Pearl'
This plant varies when grown from seed, but normally has button-like double white flowers and grows to 750mm (30in) tall.