Johannesburg Rooftop Garden Turns High-Rise Space Into a Hydroponic Food Source

A September 30 Daily Maverick report describes the Lake Success Rooftop Food Garden, where residents grow and sell leafy greens while gaining practical gardening and basic business skills. The hydroponic setup supplies plant roots with nutrient-rich water instead of relying on soil.

Official information from the Johannesburg Housing Company adds useful context: JHC and the Johannesburg Development Agency established a rooftop food garden at Lake Success in 2014, and about a decade later the site was upgraded with hydroponic growing systems. 

Today, residents cultivate crops including spinach, kale, spring onions and chamomile, with some produce sold locally and some donated to tenants in need.

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Why Hydroponics Works Well for Leafy Greens

From a plant-care perspective, hydroponics is not simply about replacing soil with water. The nutrient solution has to provide the correct balance of minerals, while pH and electrical conductivity influence how efficiently roots can absorb them. 

University of Minnesota Extension recommends regular monitoring of both parameters in hydroponic systems.

The Johannesburg project demonstrates how controlled root nutrition and vertical space can be combined where conventional garden beds are unavailable.