Humboldt Nutrients B405 Bloom , 32-Ounce Part of our 3-part base nutrient program Precise formulas when used with our grow and micro contain the ideal mix of nitrogen, phosphorous, potassium, micro-nutrients and trace elements 3-part line is derived from safe, non-toxic raw materials sourced in north america Contains proprietary ingredients that have helped our products consistently outperform traditional 3-parts Developed in partnership between humboldt county experts and our phd chemists