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Fermented liquid biofertilizer

Biostimulants Bio-input
commercialized
Fermentation Most viewed Most requested

Fermentation

Biological transformation of the plant material by microorganisms (yeasts, bacteria) in total or partial absence of oxygen, releasing and transforming active compounds over a longer period than the other techniques (days to weeks).

Process summary

1) Chop the plant material and submerge it in water, in a wide, non-airtight container (to let gases escape). 2) Stir daily during fermentation. 3) Let ferment from several days to several weeks, depending on ambient temperature, until it stops foaming. 4) Strain and dilute before use — the undiluted product can be very concentrated.

See all preparation methods

✅ Authorised (some countries)

A fermented liquid biofertilizer, rich in rapidly assimilated nutrients and beneficial microorganisms, that stimulates plant growth.

Application

Application description: Dilute before applying (typically 1:10 to 1:20 with water) and apply as a foliar spray or to the soil (fertigation), preferably first thing in the morning or at dusk. Repeat every 15–20 days.

Tips

If the biol smells bad—like rot—instead of sweet and fermented, something has come into contact with the air: check the airtight seal and the vent valve. For foliar application, dilute 1 liter of biol in 10 to 20 liters of water. For soil irrigation, apply 1 to 2 liters per mature plant, diluted. Always use manure from healthy animals and chlorine-free water.

Preparation process

1) Mix the fresh manure with clean water in a plastic container with an airtight lid (50 to 200 liters, depending on the amount you want to prepare). 2) Add the dissolved molasses and plant scraps. 3) Add the buttermilk, if using it. 4) Seal the container tightly, installing a water-trap-style vent (a hose submerged in a bottle of water) to release gases without letting air in. 5) Let it ferment for 30 to 60 days, depending on the ambient temperature. 6) You’ll know it’s ready when it stops producing gas, has a dark brown color, and a sweet, fermented smell—never a rotten smell.

Ingredients

  • 1 part fresh manure (cow, guinea pig, chicken, or rabbit). 1 part molasses or panela dissolved in warm water. 10 parts clean, chlorine-free water. A handful of fresh plant scraps (leaves, peels, cut grass). Optional: half a cup of unsalted buttermilk, to enrich the fermentation process.

Tools and equipment

  • Plastic container with an airtight lid. Hose and bottle for the vent valve (water trap). Stirring stick to mix before closing. Strainer to filter before use.

Product obtained

A dark brown liquid with a sweet, fermented odor, rich in nutrients and phytohormones produced during anaerobic fermentation, used in diluted form as a foliar or irrigation biostimulant.

Source / Reference

Agroindustrial Engineer (ingenieroagroindustrial.com); López, Juanfran (2022). The Biofertiliser Manual, 2nd edition. www.juanfranlopez.com

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 Argentina, in Burundi, in Chile, in Colombia, in Costa Rica, in Ecuador, in Indonesia, in India, in Kenya, in South Korea, in Morocco, in Peru, in the Philippines, in Rwanda, in Tanzania and in Uganda

Authorised bio-preparations: Argentina
Authorised bio-preparations: Burundi
Authorised bio-preparations: Chile
Authorised bio-preparations: Colombia
Authorised bio-preparations: Costa Rica
Authorised bio-preparations: Ecuador
Authorised bio-preparations: Indonesia
Authorised bio-preparations: India
Authorised bio-preparations: Kenya
Authorised bio-preparations: South Korea
Authorised bio-preparations: Morocco
Authorised bio-preparations: Peru
Authorised bio-preparations: Philippines
Authorised bio-preparations: Rwanda
Authorised bio-preparations: Tanzania
Authorised bio-preparations: Uganda

Liquid biofertilizer produced on the farm from manure, plant residues, molasses, and whey, for personal use only, without authorization for commercial sale. Manure is a Category 2 animal byproduct that may be applied to the soil without further processing if the competent authority finds no health risk; milk and milk products handled on the farm of origin are exempt from Regulation 1069/2009. Its application to the soil complies with national fertilization regulations (in Spain, Royal Decree 1051/2022). Its ingredients also appear on the official lists of inputs permitted in organic farming of: Argentina, Burundi, Chile, Colombia, Costa Rica, Ecuador, Indonesia, India, Kenya, South Korea, Morocco, Peru, Philippines, Rwanda, Tanzania, Uganda. Depending on the country, some are only allowed under conditions (certification body approval, maximum doses): see each country's page.

Official texts

Official sources automatically checked on 20/10/2026.

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

Documentary information, checked on 19/10/2026. Not a substitute for legal advice; regulations may vary from country to country. See the regulations · Substances authorised in Europe

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