Cultivar
'Haba Shan'
This dwarf shrub grows to 500 mm (20 in) in 10 years with a grey green oblong leaves forming an upright habit.  It produces showy lavender blue broad funnel-shaped flowers in terminal trusses during the spring.  

This frost hardy shrub originated from Sichuan where it was found growing in boggy soil. It is suitable for small gardens rockeries all as a container plant preferring a moderately sunny protected position.