RHS 
Herbaceous Perennial
Clump-forming perennial, to around 65cm tall, with lance-shaped mid-green leaves, and bearing clusters of funnel-shaped flowers with pale pink outer petals, darker flushes at their tips and inner petals with a pale yellow zone and dark streaks, flowering in summer and autumn
Position
Full sun, Partial shade
Soil Types
Chalk, Loam, Sand
Max Height
0.5-1 metres
Max Spread
0.1-0.5 metres