It is a fast grower, blooming quickly, with light trimming encouraging more blossoms. There are cultivars with red, orange, red-orange, white, pale yellow, or bright yellow flowers, with or without the characteristic chocolate-purple centre which inspires the common name.
A fast-growing plant, blooming quickly; light pruning promotes more blossoms. There are cultivars with red, orange, red-orange, white, pale yellow, or bright yellow flowers, with or without the characteristic chocolate-purple center that gives rise to the common name.