I use this during Vegetative stage as a light Nitrogen amendment, and root zone stimulant, at very low doses in between regular feedings. The conventional chemical product I would use for this same process is Advanced Nutrients Revive, which I have slated to the back only to use as a Nitrogen supplement and de-stressor.
I use it every feeding during Flower cycle, every week up to the 2nd week before flushing. This product keeps your plants greener for longer, prolonging the time the plant uses its own metabolic processes and sugars from the leaves turning them yellow. The bat and seabird guano improve smell and taste of end product considerably, and increase the yield overall between 20-35%.
And let me say this most emphatically; you cannot overfeed this product. You can use as much at the roots as your wallet can allow. Do not spray foliar, will create a mild tip burn.
TheFuture