Cultivars
'Cloudbeater'
This perennial has double flowers and open on cloudy days. There is a full colour range available and grows on most well drained moderately fertile soils. It has a low water requirement once established. (Scale: 1-drop from 3)

 'Sunnybank'
This perennial produces single and double flowers in many colours and is excellent for a sunny rockery. It has a low water requirement once established. (Scale: 1-drop from 3)