Humboldt Master A (4.9-0-3.8) is the first of a premium two-part amino acid-based fertilizer program designed for all plants, regardless of whether they flower or not. These amino acids and organic acid complexes increase the availability of macro and micro nutrients.
Master A&B is made with non-toxic, high quality ingredients. This vigorous 2-part nutrient solution contains no EDTAs and can be used in any growing medium.
Master A and Master B are both formulated to provide your plants with higher absorption of nutrients, vitamins, minerals and trace elements. (A & B formulas are sold individually.)