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


PERLHUMUS® Granules is a high quality humic material soil conditioner (leonardite) which acts as a natural chelator. It consists of immediately available nutrient humus and high quality permanent humus, which cannot be easily decomposed by soil microorganisms. 

German leonardite (highly oxidized lignite) is a natural raw material containing a high content of humic matter (humic acid and fulvic acid). Leonardite is formed in specific sediment layers of oxidized soft brown coal that did not reach the stage of brown coal. It arises from chemical and biological humification of plants and other organic matter, out of biological activity and geological processes.


The most outstanding benefits of PERLHUMUS® Granules as a soil conditioner are the demonstrable positive impacts on plant growth and health as well as on resistance to stress factors (dryness, salt and pesticides). These benefits result from the high cation exchange capacity of PERLHUMUS, its pH-buffering capacity and its high capacity to retain water.

PERLHUMUS® Granules stimulates the activity of beneficial soil organisms through its high carbon content. Due to its excellent properties, it can be applied on all types of soils and for all plants to stimulate plant growth and increase yield. It can be mixed with all granular fertilizers.

  • Improves the structure and aeration of soil
  • Increases the water retention capacity of soil
  • ​Improves soil buffering capacity
  • ​Reduces soil erosion
  • Helps to neutralize toxins and sequesters heavy metals in soil
  • ​Reduces nutrient leaching
  • ​Adjusts soil pH value to a neutral range
  • Reduces soil salinity
  • ​Increases biomass production 
  • ​Promotes root respiration and development, especially vertically 
  • ​Improves nutrient uptake through the root System


In all crops
400 kg/ha

Vegetables in greenhouses 
Band application 10–20 kg/100 m² during soil preparation 

Horticultural fruit trees
0.5–2 kg/tree to hole during planting, or 10–15 kg/m² with the first fertilizer to total tree shade area

Open field vegetables
10–15 kg/m3 during soil preparation or as band application with the first soil fertilizer application

Cereals, potatoes, legumes
300–400 kg/ha during soil preparation or as band application with the first soil fertilizer application

Ornamental plants and tree nursery
10–15 kg/m³ during the preparation of substrates

Landscaping (in general)
5–10 kg/100 m²

Turf grass
20–30 kg/100 m² during soil preparation for lawns or 10 kg/100 m² every year

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



Brownish granules

Total humic substances

55 - 60 % w/w

Humic acids (ISO 19822)

32 % w/w

Hydrophobic fulvic acids (ISO 19822)

4 % w/w

Dry substance

70 ± 3 % w/w

Total organic substance (dry matter)

>90 % w/w

Particle size

2 - 8 mm

Total Organic Nitrogen (dry matter)

1 % w/w

Phosphorus (P2O5)

0.2 % w/w

Potassium (K2O)

0.3 % w/w


0.22 mS/cm


6 - 7

Source: report on application Perlhumus by Andreas Krauss (

Other options:

If you are looking for a highly concentrated water soluble Humic Acid POWHUMUS® WSG 85

Organic Soil Conditioner POWHUMUS® WSG 85 Find out more 

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 liquid Humic Acid with a high percentage of Fulvic Acid FULVAGRA® 25 Liquid

Highly Bioactive Growth Promoting  FULVAGRA® 25 Liquid 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


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