JINGFENGR® insoluble humic acids line—from natural weathered coal/lignite—delivers long-lasting soil improvement, nutrient retention, and eco-friendliness. It covers multi-form (powder/granule/prills), mechanization-friendly granules, blending-suitable prills, and microbial-infused options. All meet ISO/CERES standards with strict heavy metal controls, boosting soil health and yields.

Premium leonardite/lignite source, high free humic acid content.

Insoluble Humic Acid Powder
insoluble humic acid granule

Made from high-purity leonardite/lignite via disc granulation.

Insoluble Humic Acid Granules
Low Moisture High Hardness insoluble Humic acid round balls prills 2

Low Moisture & Anti-Caking, High Hardness for Blending & Mechanization.

Insoluble Humic Acid Prills
Microbial Humic Granular Fertilizer 1

Wide Adaptability & Soil Improvement. Nutrient Activation & High Efficiency.

Microbial Humic Granular Fertilizer

Insoluble Humic Acids