Abstract: A soil and foliar supplement for application to plants to improve plant growth and quality. A method for increasing plant productivity and quality also is disclosed. The supplement includes a quantity of specific microbes and an organic acid, such as humic acid, fulvic acid, and ulvic acid. Trace minerals also can be added. A humectant also can be incorporated with the microbes, organic acid, and trace minerals to provide a matrix to provide an improved moisture and nutrient environment and a greatly increased surface area and cation exchange ability for optimizing microbe growth. Chelated micronutrients may also be added to the supplement or added later to the foliage to improve the effects of the supplement still further. Methods of improving plant productivity and quality by treating the plant with the microbes, organic acids and a naturally balanced formulation of chelated minerals are disclosed.