B52 500ml gives the plant a massive energy boost by increasing its metabolism. It also increases nutrient uptake by providing naturally occurring hormones and vitamins that the plant would not get from anywhere else. The absolute best effect of B52 is certainly the stressreducing effect this booster has on plants. No matter what growing medium is used, whether in soil or hydroponically, B52 always works. Whether added to the nutrient tank, as a foliar spray or watered directly dissolved in water, B52 can and should be used throughout the life of the plant, from seedling or cutting to harvest. The 5 days before and 7 days after flower initiation are excluded. Due to the active stressreducing effect of B52, it could be that the flower initiation is delayed. However, when used correctly, exactly the desired effect is achieved. Because B52 was discontinued 5 days before flower initiation, the plant is stressed anyway, and the light reduction puts it under additional stress and triggers flowering more quickly.