Humic Acid Fertilizers: What Buyers Should Know
Humic acid fertilizer is derived from leonardite and lignite, rich in humic and fulvic acids that improve soil structure, water retention, and nutrient chelation. Buyers source humic acid fertilizers from China for cost-effective powder, granular, and liquid forms used in soil amendment and fertigation.
The key specifications are humic acid content, fulvic acid fraction, water solubility, and source material. High solubility suits drip systems, while granules suit broadcast application. The curated suppliers below are screened against these criteria.
Curated Suppliers — Humic Acid Fertilizers
7 Checks Before Choosing a Humic Acid Fertilizers Supplier
1. Humic acid content
Confirm the percentage of humic acid on a dry basis on the certificate.
2. Fulvic acid
Higher fulvic acid fraction improves solubility and foliar uptake.
3. Solubility
Choose fully soluble grades for drip irrigation; granular for broadcast.
4. Source material
Leonardite-derived humic acid is generally more active than lignite.
5. pH
Check pH to ensure tank-mix compatibility with other inputs.
6. Heavy metals
Request third-party heavy-metal reports for import compliance.
7. Formulation
Powder, flake, granule, or liquid; match form to your application method.
Frequently Asked Questions
What is humic acid fertilizer?
It is a soil and plant amendment derived from leonardite or lignite that improves soil structure, water retention, and nutrient availability.
What is the difference between humic and fulvic acid?
Humic acid has larger molecules and mainly conditions soil, while fulvic acid is smaller, more soluble, and better absorbed by leaves and roots.
How is humic acid fertilizer applied?
It can be broadcast as granules, dissolved in fertigation water, or sprayed on foliage depending on the formulation.
What is the MOQ for humic acid fertilizer from China?
Typically 5-10 metric tons; see each supplier profile for exact MOQ and packaging.