Cultivars
'Forest Blue'
This deciduous shrub grows to 1 m (3 ft) tall by a 1.5 m (5 ft) wide forming a spreading rounded habit. It has yellowish green leaves that turn russet-red during autumn before falling and the cobalt-blue flowers appear in dense clusters during midsummer. 

It prefers an open sunny position and grows on most well-drained fertile moist soils and during the winter months it is advisable to mulch the root ball with organic material.