Gold Label Ultra PK is a flowering additive based on advanced polyphosphates and chelated trace elements.
Ultra PK is a flower enhancer that is unrivaled in purity and quality, giving you the best yields imaginable. This formula prevents phosphorus from depositing at pH levels greater than 6.2, promotes availability of calcium, magnesium and trace elements while keeping your drip lines clean.
Use in combination with Gold Label Base Nutrients.
— Ships from HF: OR, CA, CO, PA, TX, FL USA (not via USPS).