The Foundations and Principles of Biodynamic Preparations

Manfred Klett; Translated by Bernard Jarman

Available (printed to order)

Quick Look

  • Unearths the origins and theory of the biodynamic preparations, highlighting the spiritual principles at their roots
  • Examines the principles behind the eight biodynamic preparations, outlining their different properties, and explaining the effect of each on the health and vitality of the soil
  • Manfred Klett is a leading authority in biodynamics with over sixty years of practical experience

This important exploration of the preparations is essential reading for biodynamic practitioners. It explores the origins and theory of the preparations, the stages that go into making them, and the effect they have on the soil and plants.

216 x 138 mm
Floris Books
Biodynamics & Organics
224 pages
Publication date:
30 Mar 2023


At the heart of the biodynamic method are the eight preparations used to enhance the health and vitality of the soil: horn manure, horn silica, yarrow, chamomile, nettle, oak bark, dandelion and valerian. In this deeply insightful book, renowned biodynamic expert Manfred Klett explores the principles that underlie the preparations. He looks in detail at each preparation, describing their different properties, how their substances are enhanced and transformed through the stages of preparation, and the effect each preparation has on the soil and plants.

Throughout, Klett advocates a holistic approach, which sees farms and gardens as integrated living organisms with the preparations playing a key role in improving the quality of the soil and producing healthy plants.

This is essential reading for biodynamic practitioners who want to delve more deeply into the origins and theory of the preparations, and who want to better understand the spiritual principles that underpin how they work.

Table of Contents

The Spray Preparations
1: Horn Manure (500)
2: Horn Silica (501)
The Compost Preparations
3: Yarrow (502)
4: Chamomile (503)
5: Stinging Nettle (504)
6: Oak Bark (505)
7: Dandelion (506)
8: Valerian (507)
9: Equisetum Tea
10: How the Six Compost Preparations Work Together
Note on Sources


'This must be the definitive book on the topic, based on Steiner's 1924 agriculture course that metamorphosed into biodynamics. Here he explained 'how the health of the soil and of the plants depends upon bringing nature into connection with spiritually creative forces that stream in from the cosmos.' The eight spray and compost preparations are intended to revitalise the soil and are based on the cycle of seasons characterised by summer, air and warmth, and winter, water and earth.'
-- Paradigm Explorer

'For those engaged in trying to orientate themselves in the riddles that the agriculture course presents through theory and understanding, this book is recommended as a thorough and diligent attempt at providing some answers.'
-- Star and Furrow


Dr Manfred Klett is a founder of a biodynamic farming community in Germany. He is the former director of the Department of Agriculture at the Goetheanum in Switzerland and has over 60 years' experience of biodynamic agriculture.

Bernard Jarman is a biodynamic consultant based in Stroud, UK. He is a director of the UK Biodynamic Association.

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