Cultivars
'Alba'
This perennial grows to 1.2 m (4 ft) tall by 500 mm (20in) wide with mid-green foliage and produces pure white bell-shaped flowers in pendant racemes from late spring to late summer. 

It prefers a semi-shade to dappled light position and grows on most well-drained organic rich moist soils and is ph adaptable. It is planted in herbaceous borders or can be grown in containers.  USDA zone 4-10

'Golden Heart'
This perennial has upright yellow foliage the turns lime green during mid-summer and produces fuchsia pink bell-shaped flowers in pendant racemes amongst the foliage from early to late summer. 

It is ideal for colour contrast in herbaceous borders or as a specimen in patio pots or planter boxes preferring a semi-shaded moist position.