Cultivars
'Ardons' 
This upright shrub produces large mauve flowers with crimson centre appearing during summer.

'Blue Bird'
The shrub forms a compact rounded crown and produces single violet blue flowers with a red centre during summer.

'Diana'
This shrub produces broad pure white flowers during summer.
                
'Woodbridge'
This shrub produces two-toned pink flowers that are up to 100mm $in) wide.

'Duo de Bradant'
This shrub produces double flowers that are deep rose pink.

'Hamabo'
This shrub produces single flowers that are blush white with a crimson centre appearing through out summer.

'Lady Stanley'
This shrub produces semi-double flowers that are white flushed with rose and blotched with crimson.
                      
'William R Smith'
This shrub produces single pure white flowers with crimped petals.