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Biodynamic preparation 500 (horn manure)

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Biodynamic preparation 500 (horn manure)

Cow dung fermented in a horn over winter

Soil conditioners Fermentation

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

 Biodynamic ✅ Authorised EU Bio-inputs in the European UnionBio-inputs in BurundiBio-inputs in KenyaBio-inputs in RwandaBio-inputs in TanzaniaBio-inputs in UgandaBio-inputs in South SudanBio-inputs in the Congo - KinshasaBio-inputs in Somalia

Biodynamic farming preparation intended for the soil: in this practice it is sprayed to support soil life and root development.

Application

Application description: On the soil. Before use, the preparation is mixed into lukewarm rainwater or unchlorinated water and stirred for one hour, changing direction each time a vortex forms (dynamisation). It is sprayed in large drops on moist soil, in the late afternoon, right after stirring; at least twice a year, at the start and end of the growing season.

Dose: Indicative: about 100 g in 25 to 50 litres of water per hectare (about 2.5 g per 100 m² in 1 litre of water).

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Regulatory status

✅ Authorised in the EU Bio-inputs in the European UnionBio-inputs in BurundiBio-inputs in KenyaBio-inputs in RwandaBio-inputs in TanzaniaBio-inputs in UgandaBio-inputs in South SudanBio-inputs in the Congo - KinshasaBio-inputs in Somalia

Bio-inputs in the European Union Bio-preparations authorised in the European Union
Bio-inputs in Burundi Authorised bio-preparations: Burundi
Bio-inputs in Kenya Authorised bio-preparations: Kenya
Bio-inputs in Rwanda Authorised bio-preparations: Rwanda
Bio-inputs in Tanzania Authorised bio-preparations: Tanzania
Bio-inputs in Uganda Authorised bio-preparations: Uganda
Bio-inputs in South Sudan Authorised bio-preparations: South Sudan
Bio-inputs in the Congo - Kinshasa Authorised bio-preparations: Congo - Kinshasa
Bio-inputs in Somalia Authorised bio-preparations: Somalia

Biodynamic preparations are allowed in EU organic production (Regulation (EU) 2018/848, Annex II, Part I, point 1.9.9) and are listed in the East African standard EAS 456 (Annex B). The animal organs used are animal by-products: Regulation (EC) 1069/2009 (Art. 16(f)) allows their use for these preparations with the authorisation of the competent authority (in Spain, generally authorised by Royal Decree 1528/2012, Art. 13).

Official texts

Official sources automatically checked on 27/10/2026.

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

Documentary information, checked on 25/10/2026. Not a substitute for legal advice; regulations may vary from country to country. See the regulations · Substances authorised in Europe

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See also

Recipes sharing ingredients

Bijamrita Panchagavya Amrit pani Jeevamrut Biodynamic preparation 501 (horn silica) Maria Thun cow pat pit (CPP) Bostol

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