The best potassium humate product depends on the application and form (granules, liquid, powder). Super Potassium Humate 98% from Shandong Chuangxin is highly regarded for its high concentration of humic substances and excellent solubility, making it ideal for foliar application, fertigation, and soil amendment. Humic Growth Solutions also offers premium-grade liquid potassium humate, which is widely used for quick nutrient absorption and improving soil fertility.