Organic Soil Conditioner 


WSG 85

Potassium Humate Water Soluble Flakes

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.

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