Humax® Humic Acid Humax is concentrated liquid humic acid (the "black gold of agriculture") extracted from leonardite. Researchers indicate humic acids are nature's gift to agriculture; they increase nutrient availability, promote nutrient uptake, and stimulate plant growth. The colloidal nature of humic acid allows it to absorb large quantities of water and thus increases the water holding capacity of soil. Crops grown on soils containing more humic acid tend to be more drought resistant. Humax is an all-purpose soil additive used for vegetables, fruits, trees and gardens. © Copyright 2012 SaferGro Laboratories, Inc.