Humic acid is one nutrient that is constantly redefining plant performance and soil health. Growers, ranging from large-scale farmers to small-scale gardeners, are moving increasingly toward biologically active soil inputs in 2025. Nowadays, humic acid fertilizers are a necessity rather than a niche.

These organic-based enhancers help plants resist drought and salinity stress, improve soil structure, promote microbial life, and improve nutrient uptake. However, not every humic acid product is made equally. While some blend humic with trace minerals or amino acids for specific effects, others offer ultra-high solubility for fertigation.

We’ve researched, compared, and tested multiple products and compiled this list of the seven best humic acid fertilizers for 2025 based on purity, usability, and plant response across various crops.

What to Look for in a Humic Acid Fertilizer

Before exploring the top picks, it's helpful to know what makes a humic acid fertilizer effective:

• Purity and concentration: Higher percentages (85–98%) are more potent but require correct dilution.
  
  

• Solubility: Significant for drip systems and foliar applications.
  
  

• Source material: Leonardite-derived humic acid is the gold standard.
  
  

• Formulation: Available as flakes, granules, liquids, or blends with other nutrients.
  
  

For farmers working with precision inputs, HUBEL - humic acid 98% potassium humate stands out early on. It’s fully water-soluble, has high carbon content, and is especially useful for improving nutrient mobility in alkaline soils. It’s also compatible with most fertilizers and microbial products, making it an excellent base input for modern integrated nutrition plans.

• Leonardite-derived humic acid ensures high bioavailability.
  
  

• Ideal for fertigation and foliar systems across fruiting and root crops
  
  

1. HUBEL Humic Acid 98% Potassium Humate

This product leads with its high solubility and purity. Farmers reported improved shoot length and chlorophyll density in wheat, sugarcane, and tomatoes. It's especially effective in high-pH or nutrient-deficient soils, where nutrient lockout is common.

Form: Shiny flakes
Application: Soil and foliar
Recommended for: Vegetables, orchards, cereals, and polyhouse crops

2. GrowMate Organic Humic Liquid

GrowMate provides a liquid, bioavailable humic blend with a lower concentration that reacts more quickly. It is well-liked for greenhouse plants, turf, and garden beds. This blend works well for novices or in conjunction with microbial inoculants and compost teas.

Form: Liquid
Humic acid: ~12%
Unique trait: Includes fulvic acid and seaweed extracts
Best for: Small-scale gardeners, landscapers, and nurseries

3. Biowin BlackGold 85% Humic Granules

This granular form greatly benefits automated spreading and broadacre crops. It is stable in the sun and has a delayed release. Farmers in Gujarat and Rajasthan observed improvements in soil porosity and moisture retention.

Form: Granules
Humic content: 85%
Unique feature: Enhances microbial biomass over repeated use
Suitable for: Cotton, maize, and groundnut farms

4. GreenAge Liquid Humic Plus with Micronutrients

This liquid combines humic acid with iron, boron, and zinc, making it ideal for micronutrient-deficient soils. It offers a complete root-boosting package in one formulation and is effective in early vegetative stages.

Humic acid: 14%
Additional contents: Fe, Zn, B
Use mode: Foliar or drip
Targeted crops: Tomato, banana, chili, and floriculture

"A healthy root zone doesn’t just feed the plant—it feeds the future of your field."

5. AgriOne Super Humate Crystals

AgriOne is popular in high-tech farming installations because of its crystal shape, which dissolves rapidly and entirely. Due to its neutral pH, the product remains stable even in harsh water. Users reported a discernible rise in the shoot-to-root ratio within ten to twelve days of application.

Purity: 90%
pH: 9–10
Solubility: Excellent
Ideal for: Hydroponics, fertigation, high-yield crops

6. SoilBiotics Humi-Zyme Blend

This mixture contains charcoal particles and proprietary enzymes in addition to humic acid. It is intended to improve long-term fertility and restore deteriorated soils. Deeper systemic recuperation is supported despite slower evident outcomes.

Form: Wettable powder
Main ingredients: Humic acid, enzymes, activated carbon
Best used in: Sandy, depleted, or high-salinity soils
Special benefit: Improves C: N ratio in soils

7. Fertiplus Humic Booster 85%

Designed for tropical climates, this fertilizer is stable under UV exposure and high humidity. It works well on acidic soils and can be integrated into drip systems with minimal clogging. Its moisture-binding capacity makes it useful for dry zones.

Humic acid content: 85%
Water holding: 20–25% higher in field tests
Application frequency: Once every 20 days
Best for: Orchards, pulses, and plantations

How to Choose the Right Humic Acid Fertilizer in 2025

Each farm has different soil, crop, and climate variables. Your ideal product should match your nutrient goals, delivery systems, and irrigation setup.

Here’s a quick comparison:

These fertilizers offer a different advantage—whether you need something slow and soil-restorative or fast-acting for rapid crop cycles.

Final Note on Application

In 2025, precision in farming is everything. Even the most advanced humic acid fertilizer won’t deliver results unless used correctly. Always consider:

• Water pH and hardness
  
  

• Timing (vegetative vs flowering stage)
  
  

• Crop type and root architecture
  
  

• Climate and irrigation frequency
  
  

Always dilute according to the label, and combine humic inputs with organic matter or trace nutrients for compounded benefits.