Cultivars
'Carmine Glow'
This plant has carmine red flowers.

'Iris Prichard'
This plant has white flowers.

'Isis'
This plant has dark blue flowers.

'Weguelin'
This plant has pale blue flowers.

'Osprey'
This plant has white with blue filaments flowers.

'Purewell Giant'
This plant has large purple to red flowers.

'Purple Dome'
This plant has purple flowers.

'Red Cloud'
This plant has cerise red flowers.

'Zwanenburg Blue'
This plant has large dark blue flowers.