A Biofertilizer is a substance which contains living microorganisms which, when applied to seeds, plant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. The objective of the study was to develop a simple and cost- effective method to produce biofertilizer using agro waste. There were five types of agro wastes being used in this study they were wastes from water melon, pineapple, citrus orange, guava and banana. Solid state fermentation method was used to produce biofertilizer, which was then applied into vegetable plantation. Physical property tests were done on the plant samples of 5 weeks of age in order to determine the effectiveness of the biofertilizer. The results of the experiment showed that the plant samples treated with biofertilizer from watermelon, papaya, pineapple, citrus orange and banana wastes had promising physical characteristics. Other tests such as analyses of pH values and potassium content in the biofertilizer were also done in this research.