Gold Label Ultra PK is a flowering additive containing advanced polyphosphates and chelated trace elements. Ultra PK has been specifically developed to perfectly balance NPK and micro elements in all stages of vegetative and generative development. The Ultra PK formula prevents phosphorus from depositing at pH levels greater than 6.2, promotes availability of calcium, magnesium and trace elements and keeps drip lines clean. Recommended for use in combination with all Gold Label base nutrients.
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