Although not indigenous to South Africa, spinach is a very popular vegetable in the local diet.
Although neglected and underutilised in South Africa, indigenous vegetables can diversify farming systems, ensure food security and help to alleviate poverty, whilst increasing income and improving human health.
Indigenous vegetables are tolerant of harsh environmental conditions, having already adapted to local Southern African conditions (as most grow wild) and are therefore suited to non-irrigated production. In addition, these crops are also part of the region’s cultural heritage.
‘African leafy vegetables’ refers to the group of plant species used as leafy vegetables and is also called morogo or imifino by locals in Southern Africa. African leafy vegetables form part of the daily staple diet of millions of (often rural) South Africans and are rich in nutrients such as vitamin A and iron.
The young, succulent stems, flowers and very young fruit, are used as vegetables. Dishes may be prepared from a single vegetable or from a combination of different species. To add flavour, ingredients such as tomatoes, onions, peanut flour and spices may be used. Most of these crops are wild harvested, while a few are cultivated, mostly to sustain rural families.
Currently, the Agricultural Research Council (ARC) is making an effort to promote the growing and using of these vegetables by farmers, women and vulnerable groups. Research projects by the ARC focus on the development of better cultivation practices, improved planting and harvesting methods, determining the optimal water and fertilizer requirements, new product development and soil-water-balance modelling. This information will be utilized to generate farming guidelines for the production of African leafy vegetables.
The research program studied the following crops:
Spider plant (Cleome gynandra)
Nightshade (Solanum retroflexum)
Pumpkins and bitter melon
Cowpea (Vigna unguiculata)
Amadumbe (Colocasia esculenta)
Amaranth, corchorus and spider plant are traditional leafy vegetable crops with high nutritional value with high levels of calcium, iron and vitamins A and C. Amaranth and corchorus are also rich in protein and fibre. Although these crops can be considered as low management crops and can grow in poor soils, research results show that yield can be increased by adding fertilizer or enriching the soil with compost.
The young plants and leaves of Amaranthus spinosus are eaten like spinach and it is reputed ot increase the milk yield in cattle when grazed.
An extremely variable herbaceous plant growing from 30 cm to 2 m high. The young leaves, growth points and whole seedlings are used as a vegetable. Seeds are cooked like a grain, ground to a flour and dried. Leaves and stems are ground and used as snuff. Of all the ‘weeds’ that are also considered leafy vegetables in South Africa, amaranth has the greatest potential as a commercial crop.
A herbaceous plant with hairy leaves and stems, spider plant’s leaves are compound - like fingers on a hand - and used when young. Sometimes bitter, it is can be cooked in milk with tomatoes and served like spinach, adding a sharp taste to the dish.
Commonly known as Jew’s Mallow (Corchorus olitorius and Corchorus tridens) this plant is an annual herb with tiny yellow flowers. Cooked corchorus has a slimy texture, similar to okra. To reduce the sliminess bicarbonate of soda (or even cow urine) are added to the cooking water.
Nightshade is a herbaceous plant growing up 75 cm high and is also known for its small, shiny, purple-black fruit, which can be eaten fresh but is often used in jams. The green fruit is poisonous. Leaves and young shoots are cooked but leaves can also be eaten raw.
Pumpkins and Bitter Melon
Pick young pumpkin leaves for steaming. Remove the thorny fibres by taking a small piece of the stem and stripping it down the back of the leaf, removing the thorny fibres. Cut into small pieces before cooking or sautéeing.
The leaves of pumpkins and bitter melons (Citrullus lanatus) are used as leafy vegetables. Members of the Cucurbitaceae family, these plants are vine-like and sprawling and therefore often used to control weeds when cultivated. Also, wild-harvested, the leaves, shoots, flowers and young fruits are cooked while the roasted seeds are popular as a snack.
The pods and seeds of the cowpea plant. The leaves are also eaten as vegetable and makes a good animal feed.
The cowpea plant is a leaf and pulse crop that is indigenous to Africa. Both the fresh leaves and the ‘seeds’ are eaten as vegetables, whereas the entire plant is used as animal fodder, either fresh or as hay or silage. Cowpea flour is used in baking as well as the processed meat industry such as in chicken nuggets. Cowpeas are high in protein (18 to 35%) and carbohydrate (50 to 65%) and B vitamins.
Just harvested amadumbe tubers should be washed before boiling or roasting.
Amadumbe, also called taro, is a root vegetable and known as the ‘potato of the tropics’. Unrelated to the common potato, the amadumbe’s starchy roots are cooked similarly while its leaves and flowers are enjoyed as a green vegetable, especially popular in West Africa.
By Marinda Louw