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Wood-ash infusion (zolny nastoi)

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Wood-ash infusion (zolny nastoi)

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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 Maceration Plant-based

Maceration

Cold extraction by prolonged soaking of the plant material in a liquid (water, oil or alcohol depending on use), without heat. The longer contact time than an infusion extracts compounds that cold water alone would dissolve too slowly.

Process summary

1) Chop or crush the plant material. 2) Fully submerge it in the chosen liquid, in a closed container. 3) Let it sit in a cool, dark place, stirring occasionally, for anywhere from several hours to several days depending on the preparation. 4) Strain and use the resulting liquid.

See all preparation methods

 ✅ Authorised EU Bio-inputs in the European UnionBio-inputs in Russia

Traditional liquid feed from Russian kitchen gardens (dachas): wood ash sits in water in the sun for a few days and gives a liquid rich in potassium, with calcium, phosphorus and trace elements, for watering fruit trees, shrubs and vegetables.

Application

Application description: Root watering for fruit trees and shrubs; measured watering or spraying for vegetables and flowers.

Dose: About 0.5 L of diluted infusion per plant; up to 40 L for a large fruit tree.

Tips

Ash is alkaline: wear gloves and goggles when handling it. Do not use on acid-loving plants (hydrangea, conifers, sorrel, watermelon, camellias). Burn only clean wood: never chipboard, painted or treated wood, plastic, rubber or printed or glossy paper. Do not add potash or phosphate fertilisers on top, to avoid excess. Hardwood ash is richer in potassium; conifer ash in calcium.

Preparation process

1. Tip the ash into a barrel holding 200 L of water (or 1 L of ash per 20 L of water).
2. Leave the barrel in a warm, sunny spot and stir every day.
3. After 3 days, dilute the infusion half and half with warm water.
4. Strain through gauze.

Ingredients

  • Water ⓘ — 52.834 gal
  • Wood ash ⓘ — 2.642 gal
  • 1 bucket (10 L) of ash from untreated wood; 200 L of water; warm water for dilution.

Tools and equipment

  • Wooden stirring paddle
  • Protective gloves, goggles and mask
  • Other
  • Fine cloth for filtering

Goggles, gloves and mask required

Preparation time

3 days.

Product obtained

Greyish, cloudy, alkaline liquid.

Source / Reference

Petrova, I. (27/04/2023). «Подкормка золой: какую использовать, как развести и правильно удобрять растения», Profile.ru (según especialistas del Rosseljoztsentr / d'après des spécialistes du Rosselkhoztsentr / citing Rosselkhoztsentr specialists): https://profile.ru/news/society/podkormka-zoloj-kakuju-ispolzovat-kak-razvesti-i-pravilno-udobryat-rasteniya-1308888/ — Mezhak, S. (26/06/2020). «Древесная зола как удобрение», Fertilizer Daily: https://fertilizerdaily.ru/20200626-drevesnaya-zola-sostav-udobreniya-i-kak-ego-pravilno-primenyat — Recipe written in our own words.

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

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Country: Argentina

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Regulatory status

✅ Authorised in the EU Bio-inputs in the European UnionBio-inputs in Russia

Bio-inputs in the European Union Bio-preparations authorised in the European Union
Bio-inputs in Russia Authorised bio-preparations: Russia

Authorised in Russia and the EU. Russia: wood ash is among the fertilisers accepted by the GOST 33980-2016 organic production standard, applied under Federal Law 280-FZ of 2018. EU: wood ash from wood not chemically treated after felling is listed in Annex I of Regulation 2021/1165. Use as a fertiliser, without claiming any effect against pests or diseases.

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 01/11/2026. Not a substitute for legal advice; regulations may vary from country to country. See the regulations · Substances authorised in Europe

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