The microbes in Green Spade Probiotic Fertiliser contain photosynthetic microbes that use energy from the sun to provide energy to feed the soil microbes in your garden. These soil microbes break down organic material in your garden every day into simpler compounds that plant use for growth, including Carbon, Nitrogen and Phospohorous. When used on plants and soil, these microbes stabilise the soil, the energy and the nutrient system, making your soil more fertile! The use of Green Spade Probiotic Fertiliser results in healthier and more consistent plant growth.