The invention relates to a bio-stimulant composition for obtaining improved plant growth. The bio-stimulant composition is in the form of a fermentation broth comprising a mixture of cellular lysis components derived from on or more strains of bacteria, and one or more strains of yeast, previously cultivated and lysed in the broth. The bio- stimulant composition may be further combined with other agricultural compounds, such as urea, in order to suit the specific needs, or requirements, of the desired application.