The water hyacinth has been developed into bio fertilizer by vermicomposting through pit methods. Samples have been collected from Lake Tana.The earthworm chosen for this study was Eudrilus eugeniae.The efficacy of the prepared vermicompost has been studied on the vegetable plant corn. Chemical composition of water hyacinth was determined by the use of UV Spectrophotometer. Prepared samples of the hyacinth were administered along with the chemical fertilizer (DAP) to corn vegetables planted in pots .from the study areas contained significant amounts of chemical components. These were; Nitrogen and Phosphorous. The study recommends that the government should encourage the production of organic fertilizer from hyacinth and involve the community in their production since these will empower the community economically and help rid the lake of the weed.