Hydrotops Triple F is a 100% natural flowering stimulant developed to increase the density and mass of all flowering plants without the use of PGR's. Suitable for use with all types of growing media and nutrient regimes, Triple F is used as soon as flower sights can be seen (roughly week 3 of flower). Triple F works to assist in nutrient uptake during this period of high demand to achieve unbelievable increases in yield.