Worldwide urbanization is increasing rapidly, especially in developing countries representing a rate of 3.6 % per year from 1950 until 2005 compared with industrialized countries which only had a growth rate of 1.4 % (Aubry et al. 2012).
According to the United Nations (2013), the current world population of 7.2 billion people will increase to 9.6 billion people by 2050. A growing population is, however, not the only problem humanity has to face. Everyday, approximately a billion people are chronically malnourished (Foley et al. 2011) and on top of this we face food safety issues caused by pollution of the air and soil due to use of chemicals. To counter this we need to reconsider other to access sustainable and healthy foods by growing vegetables on balconies in urban settings.
Kenyan based Green balconies represents an opportunity for improving food supply, health conditions, local economy, social integration, and environmental sustainability. The organization is mainly involved in farming of vegetables at the balconies in Kenya Urban areas. Considering the cost of urban land, vegetables have high water and fertilizer efficiency are more profitable than growing other crops. They further have the advantage of having a special nutritional value and that no further processing after harvest is needed. Vegetables also have a very short cycle i.e they can supply growing demands very quickly. For example, some vegetable species can be harvested just 60–90 days after sowing and when cultivated with seedlings, even less.