Lessertia frutescens, the cancer bush, is a great asset in the garden since in flowers in winter, providing splashes of red. Sunbirds love it. Even the inflated seedpods are attractive.
Plant Lessertia frutescens in a sandy/loamy soil and do not overwater. The plants are short-lived but they seed themselves in the garden.
You may find stock of this plant at Random Harvest.