Also known as the African Iris, Dietes vegetata is a grass-like plant that grows in a tight clump of narrow, sword-like leaves. During spring and summer, this variety blooms white iris-like flowers, marked with yellow and purple.. Dietes vegetata is a versatile plant that can be used for borders, water gardens, mass plantings and is also well suited to patio pots and containers. Plant Dietes vegetata in an area of full sun to part shade, with well drained soil that is rich in organic material. Once established, Dietes vegetata is quite hardy. Dietes vegetata is a waterwise, low maintenance. Fertilise occasionally and water during dry spells. Do not remove flower stems as they continue to flower for several years. Dietes vegetata can grow to a height of 1.2 metres and a width of 60 centimetres.