4.9-0-3.8 Humboldt Nutrients Master A&B is a premium, naturally derived two-part amino acid-based fertilizer program designed for all plants. Humboldt Nutrients has developed the most efficient 2-part nutrient solution on the market. Using essential amino acid chelates and other complex organic acids, Master A&B will provide your favorite plants with higher absorption of nutrients, vitamins, minerals, and trace elements. The Humboldt Nutrients team of chemists emphasize balance, and consistency with all our formulas. The proprietary natural amino acid chelates present in Master A&B, combined with nitrogen, phosphorus, potassium, magnesium, calcium, complex organic compounds, and other trace elements allow your plants to effectively utilize all available nutrients. Amino acid chelates provide a much lower salt-index, eliminating potential salt build-up, and nutrient lock-out. Synthetic chelates offer a much higher salt content, which chokes out all biological activity in higher parts per million (ppm). The amino and organic acid complexes set the Master A&B series apart from your standard base nutrient by making all the macro and micro nutrients more available to your plant. Used in conjunction with Humboldt Nutrients powerful additives, we assure that your yields and quality will increase so dramatically, that your friends will call you the simply, “The Master.” DIRECTIONS: Use 1:1 Ratio with Master A&B as a two-part Base Bloom Nutrient. Adjust PPM higher in later stages of the bloom cycle to desired strength.