Cultivars
The following cultivars require fertile, moist but well drained soil in a semi shaded to full sun position. They are frost and drought tender and have a medium water requirement once established. (Scale: 2-drops from 3) They are planted as a ground cover in shaded garden beds or rockeries and may be used in containers.

'Atropurpurea'
This spreading perennial has dark purple to bronze leaves otherwise it is the same as the species.

'Black Scallop'
This evergreen perennial grows to 100mm (4in) tall by 800mm (32in) wide with leaves that are shades of purple-brown to black with ruffled margins. It produces short spikes with deep blue flowers that appear from spring to summer. 

It grows in shaded to sunny positions on moist well drained fertile soil and is commonly used as a ground cover. It has a medium water requirement once established. (Scale: 2-drops from 3) 

'Burgundy Glow'
This spreading perennial has cream to purplish variegated leaves otherwise it is the same as the species.
 
'Chocolate Chip' 
This perennial grows to 75mm (3in) tall by 1m (3ft) wide with oblong green-chocolate coloured foliage that forms a dense cover. It produces small upright spikes with blue flowers from spring to summer and the plant is used as a ground cover for small gardens or planted in containers. 

It grows in full sun to shade on well drained moist fertile soils and has a medium water requirement once established. (Scale: 2-drops from 3) 

'Evening Glow'
This perennial grows to 75mm (3in) tall by 1m (3ft) wide and has rusty-red to green leaves. It produces small blue flowers on short spikes from spring to summer. It grows in a shaded to full sun position on well drained moist soils and has a medium water requirement once established. (Scale: 2-drops from 3) 

'Multicolour'
This perennial has white to pink-purple leaves that are smaller than the species and grows in full sun. It is used for colour contrast in rockeries or along garden edges and has a medium water requirement once established. (Scale: 2-drops from 3) 

'Variegata'
This perennial has smaller light green to cream leaves and produces spikes with small blue flowers during summer. It is an ideal edging plant along borders or is grown in patio pots and prefers a semi shaded to full sun position on well drained moist soil. It has a medium water requirement once established. (Scale: 2-drops from 3) 

'Jungle Beauty'
This spreading perennial has green leaves with a purple tinge. It is a larger more vigorous than the species.

'Catlin's Giant'
This perennial has large fluted purplish leaves, growing to 150mm (6in) tall and produces small blue flowers that are held above the foliage in a spike appearing during summer. It is used as an effective ground cover that chokes out weeds and grows on moist but well drained soil in a semi shaded to full sun position. It has a medium water requirement once established. (Scale: 2-drops from 3) 

'Pink Elf'
This compact spreading perennial produces dark pink flowers from spring to summer and is planted in small gardens as a ground cover between other plants.