Grow 'em big with FoxFarm Grow Big Hydroponic Liquid Plant Food! This plant food is specifically designed to encourage vegetative plant growth in hydroponic use. Grow Big contains earthworm castings, Norwegian kelp, and essential nutrients. Once plants show signs of flowering, FoxFarm recommends switching to Tiger Bloom or Big Bloom. 3 - 2 - 6 (3 nitrogen - 2 phosphorus - 6 potassium). 1 liquid pint. Always read and follow label directions.