The production and yields of major crops are in decline in sub-Saharan Africa (SSA) due to deterioration in soil nutrients and increasing prices of farm inputs. Farmers have used manure and artificial fertilizers to improve the production of crops. Some of these fertilizers have caused adverse effects on our environment resulting in climate change. The use of frass, although minimally used by farmers, has proved to be effective in reducing greenhouse gas emissions, providing nutrient-rich feeds to livestock and organic fertilizers to crops. This article highlights the importance of keeping black soldiers fly and adopting frass to eradicate problems smallholder farmers face in soil, crop, and environmental management. The fly’s larvae feed and break organic wastes including wastes from poultry and cattle, making them free from foul odor and emission of massive carbon dioxide and methane. The larvae can also be used as livestock feeds whereas the unused organic material becomes fertilizer rich in high levels of nitrogen, phosphorus, and potassium compared to other organic and inorganic fertilizers used in SSA. For improved production, farmers need to switch to this multipurpose insect. A simulation analysis is necessary to show the future adoption of the technology. With increased awareness and training, more than a million farmers in SSA are likely to adopt this practice in less than ten years.