As they grow slowly they respond to a light application of general fertiliser in spring and early autumn. The most attractive feature of the plant is its large 100-200 mm long leaves. The leaves are dark glossy green on the upper surface and slightly paler underneath, with a purple raised midrib. The appeal of the foliage is enhanced by the reddish-purple colouring of the tip growth and the reddish stems. The creamy white flowers are 25 mm in diameter and are borne in pseudo-terminal or axillary umbels .
Individual flowers are either male or female but both appear on the same plant.
Tasmannia purpurascens does not attract many pests and diseases, although in glasshouse and indoor situations it may be attacked by mealy bug, which may distort the foliage. Thrip has also been seen to damage leaves and cause defoliation in the open garden. Plants are readily propagated from cuttings in early autumn. Propagation from seed has been difficult. Tip pruning of young plants, especially those in deep shade, will help keep a rounded bushy appearance.