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In February 2026, the average South African household food basket cost R5,383.81 per month. That number has increased by 75% since 2018. Wages have not kept up. Social grants have not kept up. And every time there is a fuel price hike, a drought, a port strike, or a supply chain disruption, the food you depend on either disappears from the shelf or jumps in price overnight.

You can grow a meaningful amount of food on a single apartment balcony in Johannesburg, and the numbers work out to roughly R500 worth of fresh produce every month once your plants are established. Not because balcony gardening is some kind of miracle, but because the most expensive items at the supermarket, fresh herbs, salad greens, tomatoes, chillies, and spring onions, are also the easiest and cheapest things to grow in containers.

Walk through any township, suburb, roadside verge, or vacant lot in South Africa and you will find blackjack. It grows in pavement cracks. It grows in abandoned fields. It grows along railway lines, in garden borders, between rows of maize, and in every patch of disturbed soil from the Cape to Limpopo. Every South African knows it because of the tiny black seeds with barbed bristles that stick to your socks, your trousers, and your dog's fur.