Raw Nutrients - Humic AcidPowerful Nutrient Chelator and Substrate Conditioner Raw Humic Acid is a fully water soluble 59% humic acid powder that's derived from leonardite. Humic acid is a key component of plant health and nutrition that makes essential nutrients more available to plants. It does this by improving the substrate's physical and chemical properties, increasing the water holding capacity and cation exchange capacity. Humic acid is also important for soil health.
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