The pale pink flowers of Indigofera superba grow in dense racemes from leaf axils near stem tips. Much white hairiness covers the spiky thin sepal lobes, the red-brown stalk of the inflorescence and the outer surfaces of the corolla, especially the keel petal.
The standard petal is prominent, narrowly ovate and tapering to a pointed tip. The pair of wing petals also taper towards their tips, but are obliquely shaped with straighter inner margins.
Flowering normally happens in summer to mid-autumn. These flowers were seen at the end of October in Fernkloof (Bean and Johns, 2005; Bond and Goldblatt, 1984).