Increases nutrient efficiency

Humic acid improves fertilizer efficiency, improves soil structure and enhances nutrient uptake.


Unique carbon matrix

Humic acid is a natural soil conditioner that acts as an organic chelator or microbial stimulator. It has a unique carbon matrix, which includes a high concentration of trace minerals of organic acids.


Reduces water requirements

Humic acid enables soil to better sequester water and allows for better water penetration in the soil, resulting in reduced water requirements.

View Humic Product Range View Complete Product Range

Why Humic Acid?

Humic acid is a natural soil conditioner, organic chelator and microbial stimulator that provides the following benefits to your soils and plants:

  • Supplies an oxidized, soluble carbon source, leading to improvement in long-term soil pH
  • Enhances efficiency and availability of applied nutrients
  • Chelates soil micronutrients, increasing their availability
  • Improves cation exchange capacity
  • Enhances soil structure and biology
  • Reduces water requirements by increasing water holding capacity and enabling better water penetration in the soil

The Three Humic Fractions

Naturally Derived Bio-Organic Carbon Sources

Humates are composed of three major fractions: fulvic acids, humic acids, and humins. Each of these fractions has some similar and some unique physical and chemical properties that contribute to their effectiveness and complement fertilizer programs. Our products contain all three forms of humic substances, maximizing the product benefits

are highly soluble and readily absorbed by leaves, making them well-suited for foliar application. Fulvic acids enhance the absorption of nutrients and the efficiency of plant metabolic reactions.

are moderately soluble. They have a high cation exchange capacity (CEC), which helps increase a soil’s nutrient holding capacity. Humic acid molecules chelate many essential nutrients and help stimulate soil microbiology

are the least soluble form of humic substances. They contain high levels of carbon and have large nutrient holding capacity. Humins persist in soils for very long periods of time.

In addition to the three humic fractions, humic products utilizing The Andersons Dispersing Granule (DG) Technology contain a unique and powerful ingredient we call humic acid precursor. HUMIC ACID PRECURSOR contains a soluble form of organic carbon that releases into the soil as DG granules disperse. Through biochemical reactions, it is transformed into humic and fulvic acids, enhancing nutrient uptake and improving soil health.

Dispersible Granule (DG) Technology

The Andersons Dispersing Granule (DG) Technology creates spherical, dust free and ultra dry particles.

These granules rapidly disperse upon contact with soil moisture, creating tens of thousands of micro particles which greatly increases surface area and allows for faster breakdown and availability of the humic materials.

Find out more about Humic DG and Black Gypsum DG below.

Soluble Granule (SG) Technology

Designed for liquid application, Soluble Granule (SG) Technology creates a highly concentrated dry humic acid granule that completely solubilizes in a liquid solution.

The Andersons soluble granules are clean, uniform and dust free, making them easy to handle. 

Soluble granules eliminate the need to ship water, which reduces handling, storage and freight costs.

Soluble granules are ideal for use in a wide variety of application equipment including sprayers, injectors, drip irrigation tank mixes and other liquid applicators used in turf.

Find out more about UltraMate SG below. 

Humic DG granules contain 70% humic acid and 10% humic acid precursor.

DG Technology creates a dust free, spherical, ultra dry particle that rapidly disperses into thousands of microparticles upon contact with moisture. Humic DG granules’ increased surface area, when compared to screened humate, creates greater availability to the plant. It performs in a wide range of conditions and soil types, independent of application method.


  • Flexible application allows for use as a stand alone product or in blends with granular fertilizers
  • 4X more efficient than screened humate
  • Enhances nitrogen and phosphorus efficiency
  • Promotes good soil structure and increases water holding capacity
  • Enhances root system development
  • Easy to handle and spread through all types of application equipment
  • Economical application cost per hectare compared to liquid and screened humates


For more information on Humic DG, click here to watch the video!

Humic DG CharX harnesses the power of humic acid and biochar in a 50/50 blend, providing the benefits of the more quickly-available humic acid and the long-term soil building qualities of biochar.

Powered by Dispersing Granule (DG) Technology, Humic DG CharX takes soil health to the next level.


Having a soil that is high in organic matter has a wide range of benefits for a turfgrass manager. Soil organic matter provides nutrient holding capacity, water holding capacity, and stable aggregates to the soil. Some of the most fertile soils in the world are located in the Amazon region. In this region, these fertile soils, known as ‘Terra Preta’, were created by Amazonian inhabitants via the addition of a variety of organic soil amendments including biochar. Biochar is the result of burning wood byproducts (feedstock) at high temperatures with little to no oxygen present. The resulting byproducts (biochar) are high in carbon and provide excellent physical structures for microbial development. Biochar works to build soil profiles, lasting for hundreds of years. Biochar also contains karrikins, a family of bioactive compounds that stimulate roots to boost new seedlings.


For peak effectiveness, biochar needs to migrate through the turf and down into the root system. This can be tricky with many products, which bring application difficulties and poor efficacy. While crumbled or micronized biochar products move well through the turf canopy, they do present challenges in allowing the product to properly flow through a standard broadcast spreader. Other biochar products contain larger chunks, which causes the product to remain in the thatch layer on top of the soil for long periods of time. Humic DG CharX features DG Technology, which allows each spherical, low-dust granule to disperse into smaller microparticles when watered. This helps both the humic acid and biochar to move quickly through the turf canopy and down to the root zone, where they can begin to go to work.

Black Gypsum DG granules are homogenous and combine natural gypsum and humic substances to form a unique bio-amendment.

DG Technology creates a dust-free, spherical, ultra-dry granule that rapidly disperses into thousands of microparticles upon contact with moisture. These microparticles deliver calcium, sulfur, and carbon directly into the soil. 


  • Contains calcium sulfate dihydrate (CaSO₄ • 2H₂O)

           - Water soluble

           - Increases calcium and sulfur without changing soil pH

  • Humic acid from oxidized lignite (leonardite)
  • Improves root development, nutrient uptake, and phosphorus stability
  • Provides secondary nutrients (calcium and sulfur)
  • Enhances soil health by stimulating soil microbial populations and relieving compaction and salinity
  • Blends with fertilizer or can be used alone



HCU granules are multipurpose soluble granules that can be solubilized for spray application or dry applied through typical dry spreading equipment. HCU 44-0-0 granules are well suited for use on large turf applications such as golf course tees, aprons, fairways and roughs, sports fields, commercial and residential lawns, ornamentals, and specialty crops.


HCU granules provide turf quality and color that is comparable to current industry leading products. In a study conducted on Bermudagrass at the University of Arkansas, HCU granules were applied at a rate of 49 kg N/ha and compared to NutriSphere-N®, UMaxx®, and UFlexx® applied at the same rate. The Bermudagrass plots treated with HCU granules had turf quality and color statistically similar or greater than industry leading products for the 11 week duration of the study. Similar results were observed on Kentucky bluegrass at Penn State University.


HCU granules are compatible with the most widely used control products for finely maintained cool and warm season turf. For peak product performance we recommend only tank mixing HCU with chelated iron (Fe) micronutrients such as Iron EDTA, HEDTA, etc. Mixing HCU with iron sulfate may potentially cause interaction issues within the tank mix. As always, we recommend a jar test prior to product mixing and application.

UltraMate is a potassium humate available in two forms—a highly-concentrated (70% humic acid) soluble granule and a liquid (12% humic acid). It forms a complete solution when added directly to liquid fertilizer, micronutrient, or pesticide formulations over a wide range of pH values. UltraMate is highly compatible, allowing application methods which are unacceptable for conventional humic products, including tank mixing. It allows turf to utilize applied N, P, and micronutrients more efficiently, reducing leaching and improving soil structure


  • Stabilizes nitrogen, reducing volatility while increasing utilization
  • Increases seed germination and nutrient availability
  • Promotes phosphorus utilization and decreases leaching
  • Contains fulvic and humic acid components
  • Compatible with liquid fertilizer, micronutrient or pesticide formulations
  • Wide range of pH compatibility (2-12)
  • Wide range of application methods including foliar spray, soil application, drip irrigation, or hydroponically


Want to see UltraMate SG in action? Click here to watch the video!


Utilizing proprietary technology to produce clean, spherical, free-flowing granules bonded with potassium humate, HCAS (20-0-0-23S) is a versatile fertility product that can be used in many turfgrass, nursery, ornamental, or specialty crops applications.

  • Provides an ideal nitrogen source for the cooler months of the growing season
  • Complementary to HCU or PCHCU applications in the warmer months of the growing season

Available in two formulations:

  • Large particle, spreadable granules for broadcast applications
  • Small particle, soluble granules for foliar applications

Fertilizer + Humic Blends

These unique fertilizer blends containing humic granules provide uniform growth, extended nitrogen feeding and enhanced nutrient uptake.


A traditional 50-lb. bag of 22-0-4 fertilizer contains approximately 20 lbs. (or 40%) of rock limestone filler. This filler is not detrimental to turfgrass, but it also provides no agronomic benefit. With 22-0-4 + HCU and Black Gypsum DG, we’ve replaced that filler with Black Gypsum DG, a dispersing granule (DG) soil amendment delivering calcium and sulfur and helping to relieve compaction and soil salinity. Black Gypsum DG and Humic Coated Urea (HCU) also deliver humates, helping to improve nutrient efficiency, increase root development, and boost soil health.

Humic DG

Product SGN Bag Size
Bulk Density UI Moisture Target Moisture Maximum Resistance to Attrition Humic Acid Content (A&L Method) Humic Acid Precursor Content Total Humic Acid Precursor + Humic Substances Application Rates Label SDS
Humic DG Greens 75 20 640 kg/m3 40+ 7% 9% 90% 70% 10% 80% See label Download Download
Humic DG 240 20 640 kg/m3 40+ 7% 9% 90% 70% 10% 80% See label Download Download
Humic DG CharX 240 40 37.0 Download Download

Fertilizer + Humic DG

NPK Description P Source K Source Application Rates
2000-SR Spreader Settings Cone Setting Bag Size
Label SDS

30% NS-54™, 23% Humic DG™
SGN 150

DAP Potassium Chloride 20 - 30 3.60 - 5.40 P2O5 L3/4 - O 6 20 Download Download

50% MUtech®, 2% Fe, 19% Humic DG™
SGN 150

- Potassium Sulfate 15 - 30 2.40 - 4.80 K1/2 - O 6 20 Download Download

50% NS-54™, 30% Humic DG™
SGN 240

- Potassium Chloride 15 - 30 2.70 - 5.40 K3/4 - O3/4 4 20 Download Download

Black Gypsum DG

Product SGN Bag Size
Bulk Density UI Moisture Target Moisture Maximum Resistance to Attrition Humic Acid Content (A&L Method) Humic Acid Precursor Content Total Humic Acid Precursor + Humic Substances Application Rates Label SDS
Black Gypsum DG Greens 75 20 800 kg/m3 30+ 3% 7% 90% 21% 10% 31% See label Download Download
Black Gypsum DG 240 20 800 kg/m3 30+ 3% 7% 90% 10% 3% 13% See label Download Download


Product Bag Size
Bulk Density UI Moisture Target Moisture Maximum Humic Acid Content (A&L Method) Application Rates Label SDS
UltraMate LQ 2 x 9.46 liters 1.08 g/mL - - 12% 9.4-14.0 liters/ha Download Download
UltraMate SG 30 41 Download -

NPK - The first line of NPK is analysis as N + P₂O₅ + K₂O. The second line is analysis as N + P + K.

P Source:  MAP = Monoammonium phosphate    DAP = Diammonium phosphate    TSP = Triple Superphosphate

Spreader settings are not intended to replace spreader calibration or bag label spreader settings. Always check the bag label for additional spreader setting information and calibrate your spreader before applying product.