German technology
Humic Substances Based Products
Humintech GmbH
Am Pösenberg 9-13
D-41517 Grevenbroich

Telefon: +49 2181 70 676 - 0
Fax: +49 2181 70 676 - 22
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POWHUMUS® WSG 85 Brochure

POWHUMUS® OMRI Certificate


POWHUMUS® FiBL Certificate

POWHUMUS® BCS Certificate


Number: EINECS - 271-030-1
Number: CAS - 68514-28-3

Reference number (REACH):


POWHUMUS® WSG 85 is a concentrated humic acid substance and a 100% water soluble high quality plant growth stimulant and soil conditioner. It can be applied to agricultural and horticultural plants by soil and foliar application. Furthermore it is a permanent humic substance which cannot be easily decomposed by soil microorganisms. It can be used alone or mixed with most fertilizers.


POWHUMUS® WSG 85 is obtained through alkaline extraction from German leonardite (highly oxidized lignite). It arises from chemical and biological humification of plants and other organic matter, out of biological activity and geological processes. Leonardite provides a very high content of humic and fulvic acids and natural biological active trace elements.


POWHUMUS® WSG 85 is a growth stimulant and soil conditioner useful especially for sandy and clay soils. Due to its crystalline granular form it can be transported easily. Moreover, it can be applied to all agricultural and horticultural plants. POWHUMUS® WSG 85 is able to enhance the performance of fertilizers and thus reduces input costs.  

  • Increases yield and improves quality of plants
  • Improves soil structure and increases water holding capacity
  • ​Increases and stimulates beneficial microorganisms
  • Enhances soil cation exchange capacity (CEC)
  • ​Increases the efficiency of fertilizers and reduces nutrient leaching
  • Promotes root development
  • Increases nutrient uptake
  • Acts as a natural chelator for microelements in alkaline soils and increases their availability for plants
  • Decreases drought- and pesticide-induced stress
  • Increases seed germination and enhances development of radicles
  • Reduces residues of herbicides and toxic substances in soil
  • Delays the decomposition of ultraviolet unstable agents


In all crops
6–8 kg/ha divided into several doses (1–2 kg/ha) during season

Vegetables in greenhouses 
8–10 kg/ha divided into several doses (1–2 kg/ha)

Horticultural fruit trees
8–10 kg/ha divided into several doses (1–2 kg/ha)

Open field vegetables
6–8 kg/ha divided into several doses (1–2 kg/ha)

Cereals, potatoes, legumes
6–8 kg/ha divided into several doses (1–2 kg/ha) during season and at the time of fertilizer application

Ornamental plants and tree nursery, turf grass, landscaping (in general)
8–10 kg/ha divided into several doses (1–2 kg/ha) or 1 kg/m3 during the preparation of substrates

Foliar application
150–300 g/1000 l water every two weeks during season

UV protection
0.1% (400 g in 400 l water/ha)

* This recommendation may be varied according to the soil characteristics and local conditions.

INHERENT COMPOSITION (Typical values on basis Dry Matter)

Potassium - Humates

80 - 85 %

Total Humic Acids 1/2

68 - 71 %

Humic Acid 1

63 - 65 %

Fulvic Acid 1

5 - 6 %

Potassium (K2O)

10 - 12 %

Dry Matter

83 - 85 %

Organic Substance

68 - 73 %

pH - value

9.5 - 10.5

Bulk Density

0.55 - 0.65 kg/L

1 according to ISO 19822 / HPTA / AAPFCO / IHSS Analysis method 
2 according to CDFA  65 % / Colorimetric method 73 %
“All Humintech humic substances based products are analysed according to the HPTA test method (ISO 19822:2018) to determine the content of humic and hydrophobic fulvic acids. Most suppliers are using the more simple “colorimetric” analysis method to determine the humic and fulvic acid contents, but experience shows that, due to its inaccuracy, this method indicates higher contents and is not suited to identify non humic substances such as lignosulphonates. In order to maintain the highest quality standard, Humintech has therefore decided to use the currently best analytical standard for the determination of humic and fulvic acids within the scope of quality control.”

Customer report on application Powhumus

Other options:

If you are looking for a Granulated Natural Humic Acids PERLHUMUS® Granules.

Organic Soil Conditioner  PERLHUMUS® Granules Find out more

PERLHUMUS Granules Humic Substance Granules Organic Soil Conditioner PERLHUMUS Granules Humic Substance Granules Organic Soil Conditioner

If you are looking for a liquid Humic Acid with Potassium Humate 18% LIQHUMUS® Liquid 18.

Organic Soil Conditioner LIQHUMUS® Liquid 18 Find out more

If you are looking for a high quality liquid native Humic Acid Suspension HS-300BIO.

Organic Soil Conditioner HS-300BIO Find out more

If you are looking for a liquid Humic Acid with a high percentage of Fulvic Acid FULVAGRA® 25 Liquid.

Highly Bioactive Growth Promoting  FULVAGRA® 25 Liquid Find out more


Humintech is a biotech company based in Grevenbroich, Germany. We are primarily focused on the research, development and industrial production of humic matter and humic acids for the agricultural sector.  Our products find further use in the feed, pharmaceutical and construction industry, in veterinary medicine and for ecological purposes such as water purification and soil decontamination.


Humintech GmbH

Am Pösenberg 9-13
41517 Grevenbroich / Deutschland 

Phone: +49 2181 70 676 - 0
Fax: +49 2181 70 676 - 22