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Potassium humate

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Potassium humate

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⚠️ Protective equipment required for this preparation

This recipe involves handling products that may be irritating or toxic. Always wear the following equipment:

By

Biofertilizers Other Mixed (several origins)

Other

A preparation method specific to this particular record, different from the four usual methods (infusion, decoction, maceration, fermentation).

Process summary

See the record itself for the detailed step-by-step process — there is no single generic process for this category.

See all preparation methods

 ✅ Authorised EU Bio-inputs in the European Union

Liquid extract of humic substances obtained from composted organic matter with potassium hydroxide, presented by the source as a potassium-rich biofertiliser that improves soil structure.

Application

Application description: To the soil around the roots, or as a diluted foliar application (fruit trees, plantain), according to the source.

Dose: Soil: from 5% (10 L in 190 L of water), 1 to 3 L per tree depending on age. Foliar: 1 L per 200 L drum on fruit trees, up to 4 L per 200 L on plantain.

Tips

Potassium hydroxide is corrosive: gloves, goggles or face shield and long clothing are essential; always add the water gradually, away from children. Filter well before use so as not to clog nozzles.

Preparation process

1. Put on protective equipment (nitrile gloves, face shield with filter): potassium hydroxide is highly alkaline.
2. In a 200 L plastic drum, alternate layers of dry organic matter and hydroxide until both are used up, then mix dry.
3. Add water very slowly until the solids are covered: the reaction gives off heat. Leave for 24 hours.
4. The next day, top up with water to 100 L.
5. Stir morning and evening for four days.
6. On the fifth day, draw off the liquid from the top and filter it.

Ingredients

  • Water ⓘ — 26.417 gal
  • Mature compost or worm castings ⓘ — 37.479 lb
  • Potassium hydroxide (KOH) ⓘ — 5.512 lb
  • For 100 L: 17 kg dry composted organic matter; 2.5 kg potassium hydroxide; water.

Tools and equipment

  • Wooden stirring paddle
  • Strainer or filter cloth
  • Protective gloves, goggles and mask
  • Container resistant to corrosive products (acids/alkalis)

Goggles, gloves and mask required

Preparation time

About 5 days.

Product obtained

Dark brown to black liquid.

Source / Reference

Asohofrucol, with FAO, the European Union in Colombia and AICS: “Guía para la implementación de biofábricas” (biofactories for peasant, family and community farming), Colombia, 2024: https://portalciudadanoagricultura.valledelcauca.gov.co/wp-content/uploads/2025/11/Guia-Asohofrucol-Biofabricas-2024.pdf — recipe written in our own words.

Recipe written in our own words by biopreparados.es. Copyright and sources

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Contact person

Grégory Prybys
Tel: +33 7 75 76 37 70 — WhatsApp: +54 9 11 2157 0868
Country: Argentina

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Regulatory status

✅ Authorised in the EU Bio-inputs in the European Union

Bio-inputs in the European Union Bio-preparations authorised in the European Union

In the European Union, humic and fulvic acids are permitted as fertilisers in organic production if obtained with inorganic salt solutions, excluding ammonium salts, as here with potassium hydroxide (Implementing Regulation (EU) 2021/1165, Annex II). A fertiliser made solely for the farm's own use falls outside Regulation (EU) 2019/1009, which covers products placed on the market.

Official texts

Official sources automatically checked on 01/11/2026.

What the icons mean: ✅ Authorised ⚠️ Tolerated 🟠 Not prohibited ⛔ Not authorised EU 🔎 Status being verified Full details →

Documentary information, checked on 28/10/2026. Not a substitute for legal advice; regulations may vary from country to country. See the regulations · Substances authorised in Europe

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