The cauliflower (Brassica oleracea var. botnjtis), belongs to the A mustard family (Brassicaceae), which also includes cabbage, Brussels sprouts and broccoli. The edible part of the plant is a cluster of immature flower buds referred to as a 'curd'.
Cauliflower is a cool-season crop. The optimal daytime temperature range for producing a marketable curd is 18°C to 20°C.
Most growing regions in south Africa have a daytime temperature of between 17°C