Carissa macrocarpa is a shrub native to Southern Africa. It is commonly known as the Natal plum and, in South Africa, the large num-num. In Zulu, as well as in the Bantu tribes of Uganda, it is called Amathungulu or umThungulu oBomvu. In Afrikaans the fruit is called noem-noem.
The natal plum needs sandy soil that has ample drainage to avoid rot. Water regularly to allow the plum to thrive, and mist regularly to imitate ambient humidity.