Home > GrowersHouse.com > Root Catalog > Default Category > Nutrients
Humboldt Nutrients Master A 4-0-3 -- 5 Gallon
Humboldt Nutrients Master A & B is a premium two-part amino acid-based fertilizer program designed for flowering plants. The amino acids 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.