Bio Green PK 13-14 PK 13-14 is a high-quality fertilizer containing all macro- and micro-nutrients necessary to strengthen the formation of blooms in any medium. Sufficient Potassium to give the bloom an additional impetus. Sufficient Phosphorus for an optimal bloom formation. Is adjusted with micro-nutrients for an optimal bloom explosion. Consists only of the purest raw materials. How To Use? Biogreen booster is used by growers to enhance soil and coco media. For soil crops, you should use 0.5ml per 1L water for weeks 3 through 4. Use 1ml formula for every 1L of water during weeks 5, 6 and 7. Use 0.75ml formula for every 1L of water during weeks 7, 8, and 9. Use 1ml formula if you are using coco coir, or any other hydroponic growth mediums. During weeks 5, and 6, increase the amount to 1.5ml. Reduce the formula to 1.5ml per 1L water during weeks 5, 6, and 9. For the best results, growers should use Xblast after using PK13/14 in the first four weeks of bloom. Make sure to shake the bottle before you use it. This product can be used with the base nutrients. Don't overdose. The product should be kept out of reach of children. Keep the product in a dark, dry place.