Nature’s Source Plant Probiotic is a unique complex of beneficial microorganisms that promote the establishment and enhance the growth of greenhouse and nursery crops, landscape plants, and agricultural crops, in all types of soils and growing media. It contains beneficial Bacillus (bacteria), Trichoderma (fungi), and Streptomyces (actinomycetes) on a 100 percent soluble powder that can be sprayed on plants and foliage or injected through an irrigation system. These soil microbes help decompose organic matter and improve soil structure. They also form a symbiotic relationship with plant roots, helping plants absorb more nutrients, resist stress, and grow healthier.