As more Africans move to urban areas, finding space for agribusiness in most cities in a tough challenge.
Francis Ndolo is a retired soldier, turned urban farmer. On just one-eight of an acre, he uses sacks to grow vegetables using a technique known as vertical farming.
A single sack can contain several plants at the same time. As a result, space is better utilised and more yield can be achieved per square metre. Better still, the cost of maintenance is much lower than with conventional farming methods.
In this short video, Francis gives several interesting tips about vertical farming and the level of rewards to expect.