Humboldt Nutrients HNMMA400 4-Ounce Humboldt MycoMadness Nutrient Myco madness is a soluble powder which contains a biologically active package It contains mycorrhizal fungi that colonize plant roots and extend the root system into the surrounding media It can help in forming an essential link between the plant roots, organic matter and fertilizers of all types Myco madness can help plants improve nutrient and water uptake for superior plant performance It greatly enhancing the absorptive surface area of root systems Not sold in HI