Humboldt Nutrients 0-6-5 Nutrient Bloom formula, was designed in Humboldt County to be used with our Grow and Micro 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 synthetic chelates. Bloom is specifically formulated to improve plant photosynthesis, metabolism, genetics and eventually crop quality and yield. Plant Growth, flowering and fruiting depend on the correct balance of Phosphorus and Potassium.