GPH Uptake is a premium liquid humic acid sourced from Humalite. Humalite is a fresh water deposit of oxidized natural compost proven to be the most bioactive humic source. GPH is for any soil or soilless garden and increases nutrient absorption through all stages of plant growth as well it provides an energy source for beneficial microbes. GPH Uptake is the premier humic acid on the market. It is designed to be used as a soil conditioner in conjunction with your regular feeding program. For optimum results, use each time you water or fertilize at the recommended application rates. - A must for dirt growers. - Speeds up plant growth. - Extremely concentrated with 8% humic acid.