Delosperma subincanum (Mesembryanthemaceae) It is indigenous to the winter rainfall areas of South Africa. Dark green leaves with white flowers. Sowing : Sow in trays, pots, etc of good seed compost in a propagator or warm place to maintain an optimum temperature of 20-25C. Cover with peat or sand. Location: Barrydale. Date of harvest: August 2018.