Cultivars
'Albatre'
This upright shrub grows to 1.5m (5ft) tall and produces double white flowers that are up to 33mm (1¼in) wide.

'Argentine'
This upright shrub grows to 1.2m (4ft) tall and produces very double white flowers that are up to 50mm (2in) wide.

'Bouquet Blanc'
This shrub grows to 2m (6ft) tall with a rounded mound-like habit and produces single white flowers that are up to 25mm (1in) wide.

'Glacier'
This upright shrub grows to 1.5m (5ft) tall and produces double white flowers that are up to 33mm (1¼in) wide.

'Minnesota Snowflake'
This upright shrub grows to 2.5m (8ft) tall and produces fragrant double white flowers that are up to 50mm (2in) wide. It can tolerate extremely cold conditions -34.4ºC (-30ºF) Zone 4.

'Snow Velvet'
This upright shrub grows to 2m (6ft) tall and produces fragrant semi-double white flowers that are up to 76mm (3in) wide.

'Virginal'
This upright shrub grows to 2.8m (9ft) tall and produces very fragrant double white flowers that are up to 50mm (2in) wide.