Humic acid-based fertilizers improve soil structure, nutrient availability, and microbial activity. The following selections are OMRI-listed or widely used in organic programs, offering concentrated sources of humic and fulvic acids suitable for lawns, gardens, and farms. This guide highlights different forms—from granular to liquid—to fit diverse application methods and growing conditions.
| Product | Brand |
|---|---|
| Down To Earth All Natural Fertilizers Organic Granular Humic Acids | Down To Earth All Natural Fertilizers |
| Wallace Organic Wonder, Soluble DS-80 Humic/Fulvic Acid | Wallace Organic Wonder |
| GS Plant Foods Humic Acid Soil Amendment – Leonardite-Derived Liquid Concentrate | GS Plant Foods |
| Humic Acid Organic Lawn Fertilizer – FoliarTech Liquid Concentrate | FoliarTech |
| Liquid 6 – Premium Humic & Fulvic Acid | Live Earth Products |
Down To Earth Granular Humic Acids
Down To Earth Granular Humic Acids is a five-pound box of all-natural fertilizer listed by OMRI for use in organic production. This granular humic acid source is highly concentrated and suitable for fields, turf, and vegetable gardens. It may enhance a plant’s ability to uptake micronutrients from the soil and is derived from ancient decomposed organic plant materials. The product is carefully mined and designed as a soil amendment to improve long-term soil health and fertility.
Wallace Organic Wonder DS-80 Humic/Fulvic Acid
Wallace Organic Wonder DS-80 offers a highly concentrated humic and fulvic acid solution with a minimum 93% humic and fulvic acids content. It is completely water soluble and suitable for dry or liquid applications. When mixed with water, it forms an organic solution compatible with many liquid fertilizers and micronutrients, making it ideal for fertigation or seed treatment. The product supports versatile use in gardens and greenhouses, delivering concentrated organic conditioning.
GS Plant Foods Humic Acid Soil Amendment – Leonardite-Derived
GS Plant Foods Humic Acid Soil Amendment uses Leonardite-derived liquid concentrate to improve soil structure and nutrient availability. The product is OMRI-listed for organic use and supports healthy root zones by increasing cation exchange capacity. Derived from premium Leonardite, it provides naturally occurring organic matter that contributes to long-term soil health and conditioning, suitable for organic growing programs and regenerative soil practices.
Humic Acid Organic Lawn Fertilizer – FoliarTech
FoliarTech’s Humic Acid Organic Lawn Fertilizer is a fulvic-humic mineral blend designed for lawns, trees, shrubs, vegetables, and crops. The concentrate helps regulate pH, reduces nutrient lockout, and enhances root development for improved nutrient absorption and yields. The product is described as OMRI-certified and suitable for eco-conscious growers seeking natural ingredients. It emphasizes compatibility with various application methods, including direct use and mixing with other additives and water.
Humic Acids – Humic Acid Fertilizer & Conditioner (5 LB)
PowerGrow Systems’ Humic Acids product focuses on increasing plant nutrient uptake, boosting soil microbial activity, and improving soil health to support seed germination. This humic acid fertilizer and conditioner is designed to work across various growing systems, enhancing the root zone’s ability to access existing nutrients and promote robust early growth in seedlings and established plants alike.
Humic Acid Organic Lawn Fertilizer (34 OZ) – FoliarTech
This FoliarTech offering provides a 34-ounce liquid humic acid lawn fertilizer concentrate designed to regulate pH, reduce nutrient lockout, and improve soil quality. It emphasizes versatility for lawns and gardens, stating compatibility with sprayers, hydroponic setups, and other irrigation systems. The formulation is described as 100% water-soluble and suitable for direct use or dilution, supporting flexible maintenance programs and healthy plant development.
Liquid 6 – Premium Humic & Fulvic Acid
Liquid 6 from Live Earth Products combines humic and fulvic acids in a premium liquid concentrate. Marketed as OMRI-listed for organic use, this product targets soil conditioning and nutrient uptake. It is positioned for use in a variety of growing systems, enabling growers to apply as a soil amendment or foliar treatment to support healthy root development and improved nutrient availability.
Buying Guide
Key purchase considerations help compare these options across form, application, and agricultural goals:
- Form and application: Choose granular humic acids for soil incorporation and slower release, or liquid humic acids for fertigation, foliar sprays, or rapid nutrient delivery. Consider your irrigation system and tank volumes when selecting a concentrate.
- Organic certification: Look for OMRI listings or equivalent certifications to ensure compatibility with organic growing programs. Some products clearly state their OMRI status, providing confidence for certified operations.
- Source material: Leonardite-derived products tend to offer high-quality organic matter and long-term soil conditioning. Granular products often provide longer-lasting soil benefits, while liquids can deliver faster results in the root zone.
- Concentration and purity: Higher humic/fulvic acid content means more potent formulations. Review product datasheets for percentage content to compare strength and coverage per application.
- Compatibility: If using with other fertilizers or micronutrients, verify solubility and compatibility (especially for fertigation and hydroponics). Some products emphasize broad compatibility with irrigation systems and micro-nutrients.
- Target crops and turf: For lawns and turf, look for products formulated for foliar or soil conditioning while avoiding potential soil pH imbalances. For vegetables and ornamentals, consider soil structure benefits and micronutrient uptake capabilities.
- Environmental and safety considerations: Opt for eco-friendly formulations that minimize chemical additives. Pet- and child-safety certifications can be important for home gardens.