Cultivars
'Federation Stars' 
This perennial produces prolific flowers with broad creamy petals and appears during late spring. It is excellent for border planting in perennial gardens and grows in full sun to part shade. 
It prefers a very well drained sandy soil that is tending acidic and has a low water requirement once established. (Scale: 1-drop from 3)

'Starbright'
This perennial is upright forming a vase habit to 700mm (28in) tall by 600mm (24in) wide with soft grey-green foliage. It produces flannel-textured creamy flowers during late spring to early summer and prefers an open sunny to semi shaded position. 
It grows on a very well drained moderately fertile sandy soil that is tending acidic and is grown in cottage gardens, perennial borders and in containers.