This method involves the bioproduction of biofertilizer with plant growth-promoting compounds, produced from the fermentation of sugarcane vinasse. This residue is primarily obtained from the alcohol production industry. Some characteristics of the biofertilizer include its content of enterobacteria and PGPM (plant growth-promoting microorganisms), vinasse, and plant growth-promoting compounds. The plant growth-promoting compounds are produced by the microorganisms during the fermentation process and are not added externally to the product.