Cultivars
There are many cultivars, please contact your local nursery for available varieties. 

'Alba'
This plant has white flowers.

'Alba Variegata'
This plant has leaves with pale margins and white flowers.

'Argenteovariegata'
This plant has leaves with creamy white margins and violet coloured flowers.

'Atropurpurea'
This plant has dark plum-purple coloured flowers.

'Azurea Flore Pleno'
This plant has double flowers that are a sky-blue colour.

'Bowles Blue'
This plant has lavender-blue coloured flowers.

'Bowles White'
This plant has pinkish buds that open to white flowers.

'Gertrude Jekyll'
This shrub has a compact habit and blooms in white flowers.

'Multiplex'
This plant has double plum-purple coloured flowers.