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
E-Mail senden

POWHUMUS® WSG 85 is a water-soluble organic plant growth stimulant and soil conditioner based on active humic acid (potassium humate). As a permanent humic substance will remain stable in the soil and cannot be easily decomposed by soil microorganisms. POWHUMUS® WSG 85 is a bioactive growth stimulant and organic soil conditioner, especially for sandy and heavy clay soils.
POWHUMUS® WSG 85 has a stimulating effect on plant growth, root development and increases and stimulates beneficial soil microorganisms.

POWHUMUS® WSG 85 can be combined with other Fertilizers and Pesticides, after undertaking a trial mix. It can be applied onto the ground or sprayed over the crop.


  • Premium quality: Highest water solubility and product purity
  • Immediately improves plant nutrient absorption and fertilizer efficiency of soils
  • Increases the stress tolerance of plants against drought, salt, cold and heat
  • Stimulates vigorous root growth and yield formation
  • Increases the buffering and cation exchange capacity of soils
  • Acts as a natural chelator for micronutrients in soils and increases their availability to plants
  • Stimulates the formation of fertile, microbially active soils
  • Improves the soil structure and increases its water holding capacity
  • Increases the germination of seeds and enhances development of radicles


  • Agriculture
  • Vegetable  Production
  • Horticultural fruit trees 
  • Substrate Cultivation
  • Hydroponics
  • Turf grass and Landscaping
  • Seed Treatment


6 - 10 kg/ha divided into several applications (1 - 2 kg/ha) during the vegetation period

15 - 30 g/100 L water every two weeks during the vegetation period

0.1 - 0.5 kg/m³

0.1 % or 100 g/100 kg seed dressing according to thousand grain weight (T.G.W.)

10 - 30 g/1000 L nutrient solution during the cultivation cycle

* These are standard recommendations that can vary according to soil properties, cultivated crop and local system conditions.

INHERENT COMPOSITION (Typical values based on Dry Matter)

Potassium - Humates

80 - 85 %

Total Humic Acids 1/2

68 - 73 %

Humic Acid 1

63 - 67 %

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.”


Store in a dry place, protected from frost, heat and direct sunlight. Store out of the reach of children!

Delivery specs

Carton Box
1/10 kg

1/5/20/25 kg

Big Bag

Filling line POWHUMUS 1 kg 

Filling line POWHUMUS 25 kg

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 granulated high quality natural humic acid soil conditioner bag

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 BASIC.

Organic Soil Conditioner HS®-300BIO BASIC Find out more

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

Highly Bioactive Growth Promoting  FULVAGRA® Liquid 25 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 pharmaceutical, construction industry, 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


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