Gold Label Soil A 1 LiterGold Label Soil A & B is a professional grade mineral two component base plant nutrient for the vegetative and flowering phase on peat and compost substrates. Add Soil A & B in equal quantities, 0.5-3 ml/liter or until the desired EC. Never combine pure nutrients together, always mix in water. Shake bottles before use, store at room temperature. Optimized for Gold Label Special Mix.