Just Scentsational’s Sunshine Harvest 12lb shaker jug of SOP potassium sulphate provides much needed energy for proper plant growth and efficient water regulation within the plant. It helps to improve plant color and vegetable flavor by building a healthy plant’s immune system and activating enzyme functions for better stems and stalks. We suggest testing your soil before applying any fertilizers. NPK 0-0-53 Size: 12lb shaker jug