Cultivars
'de Caen' 
This strain is single flowered to 300mm (1ft) tall and formed tubers. They are available in a large range of colours from pink, blue and white.  

'Blue Bonnet'
This perennial produces mid blue flowers.

'Rose of Claremont'
This perennial produces rosy salmon flowers.

'White Haze'
This perennial produces white flowers.

'St. Brigid' 
This strain is a popular form has large semi-double flowers with coloured sepals and contrasting centre of black. There are many colours available from pink, lavender to white. All cultivars derived from this strain are 100 to 120 mm in diameter.

'Amethyst Beauty'
This perennial produces flowers that are lavender-rose with a white centre.

'Beacon'
This perennial produces flowers that are scarlet with a white centre.

'Blue Admiral'
This perennial produces flowers that are violet blue with a paler centre.

'Blue Danube'
This perennial produces large flowers that are mid blue.

'Red Chief'
This perennial produces flowers that are bright scarlet.

'Rose Queen'
This perennial produces flowers that are rose pink.

'Snow Queen'
This perennial produces flowers that are white.