Grow Big Concentrate works fast to encourage lush, vegetative plant growth by providing an extra boost of nitrogen (12-7-7) and important trace minerals. Huge plants in a hurry! Spectacular green growth which leads to larger, brighter flowers. A complete, organic-based liquid plant food blended from blood meal, earthworm castings, and Norwegian kelp. Suitable for all plant types as a foliar or soil fertilizer; not for use with hydroponics systems. One-two tbsps. per gallon. From Fox Farm.