Master A&B is a premium two-part fertilizer program perfect for all plants, and made with non-toxic, high quality ingredients. This vigorous 2-part nutrient solution contains no EDTAs and can be used on any plant. Master A&B is a premium two-part fertilizer program perfect for all plants, and made with non-toxic, high quality ingredients. This vigorous 2-part nutrient solution contains no EDTAs and can be used on any plant, 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. The Master A and Master B series makes macro and micro nutrients more available to your plant. Use in conjunction with Humboldt Nutrients powerful additives for dramatically increased yields and quality.
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