Farmers often ask: “Should I use humic acid or fulvic acid?” The answer depends on your specific goals. While both are humic substances derived from leonardite, they serve different primary functions in sustainable agriculture.
Humic acid has a larger molecular weight and is best used as a soil conditioner. It stays in the soil longer, improving structure and cation exchange capacity (CEC). It is ideal for long-term soil health. On the other hand, fulvic acid has a smaller molecular weight and is highly soluble across a wide pH range. It is the “carrier” that moves nutrients into the plant, making it perfect for foliar sprays and rapid nutrient delivery. For the best results, a combination of both is often recommended to address both soil structure and immediate plant needs.
