Grow Stage Microbes are a specific group of beneficial bacteria and fungi formulated specially for the grow/vegetative stage of plants. This variety of microbes is designed to promote root growth and nutrient availability during the grow stage. Inoculate seedlings and established vegetative plants with the highest CFUs on the market! All RAW Microbes are double tested, both the individual culture/species as well as the final blend. We test twice to ensure accuracy and viability!