MILLS - ULTIMATE PK - 10LUltimate PK by Mills Nutrients is a powerful phosphorus and potassium based flowering stimulator that guarantees larger fruits and flowers while enhancing their flavor. Ultimate PK contains high levels of phosphite which is vital for the later stages of flowering. When used in the last 2 4 weeks of the flowering cycle, this booster boosts plant quality, health and yield. Ultimate PK in addition to being a powerful flowering stimulator also has the