Humboldt Nutrients 2-1-6 grow nutrient formula was designed in Humboldt County to be used with our Micro and Bloom to be a complete growing nutrient system for hydroponics as well as other growing mediums. Humboldt Nutrients has developed this vigorous three-part fertilizer without the use of synthetic chelates. Grow contains elements which form new compounds with weak electrical bonds. This increase in availability of electrons promotes efficient absorption and uptake of nutrients. This diverse formula helps assure that none of the elements necessary for plant growth will fall out of solution and lock out.