What Are the Biodynamic Preparations?

Biodynamic Compost Preparations

Biodynamic compost is enhanced and enlivened through the use of six preparations made from yarrow, chamomile, stinging nettle, oak bark, dandelion, and valerian (#502, 503, 504, 505, 506, and 507, respectively). Each of these medicinal herbs is transformed through a unique process that brings it into relationship with the animal kingdom, the earth, and the cycle of the year. Bringing these elements together magnifies their healing qualities, fosters the growth of beneficial bacteria and fungi, and creates powerfully concentrated substances to guide the development of the compost. A small quantity of each preparation is added to the compost pile just after it is built, and again after it is turned. Biodynamic preparations strengthen the quality of the compost by stabilizing nitrogen and other nutrients, multiplying microbial diversity, and bringing more sensitivity to the composting process. Biodynamic compost helps attune the soil to the whole farm organism and wider influences while increasing soil life and stable organic matter. Biodynamic compost also brings more carbon into the living realm, helping to restore balance to the climate.

Biodynamic Spray Preparations

In addition to the compost preparations, several biodynamic preparations are applied as potentized liquid sprays to bring healing, vitality, and sensitivity to the farm and garden. Horn manure (#500) enhances the life of the soil and the relationship between soil and plants, and is made from cow manure buried inside a cow horn during the winter months. Horn silica (#501) increases plant immunity, strengthens photosynthesis, enhances ripening, and is prepared from ground quartz crystals buried in a cow horn over the summer months. Horsetail tea (#508) helps prevent fungal diseases and balances the watery element in plants and soil. Together, the biodynamic spray and compost preparations bring plants into a dynamic relationship with soil, water, air, warmth, and cosmos to help them develop in a healthy and balanced way, access the full spectrum of nutrients they need, and become more resilient to pests, diseases, and extreme climate conditions. 

Further information on the preparations is available in the footnotes of our Biodynamic Principles and Practices page, through our Biodynamic Research Portal, through the preparations tag on our blog, or in the books listed below. Also check out our webinars and online courses for educational opportunities related to the preparations and other biodynamic principles.

Making and Buying the Preparations

You don't need to make your own preparations to get started. Ready-to-use biodynamic preparations can be purchased from professional preparation makers, including those listed below.

Regional Groups

Many regional biodynamic groups make the biodynamic preparations together as a seasonal community activity. Joining a regional group is a great way to learn how to make the preparations, and often finished preparations can be purchased from someone in the group.

Josephine Porter Institute (JPI)

JPI's mission is to heal the earth through production of quality biodynamic preparations, and to advance education and research in biodynamic methods. They are a source for purchasing the biodynamic preparations, an education center for all biodynamic practitioners as they begin to make their own preparations, and as a research venue focusing specifically on the biodynamic preparations.


Biodynamic Preparations Manual

By Demeter advisors Anne and Rolf Bucher. Published by the Biodynamic Federation - Demeter International (BFDI).

"Our manual offers a hands-on approach combined with illustrations which might prove to be helpful, especially for beginners. Methods and practices are explained step-by-step and alternatives are included. We would like to emphasise, however, that finding your own appropriate implementation is essential. Working with the biodynamic preparations is a wonderful means of forging a deep bond with your farm and finding ways bringing about a healthy farm."

Fellowship of Preparation Makers

The mission of the Fellowship of Preparation Makers is to ensure that good quality biodynamic preparations are available now and into the future throughout North America. The Fellowship (previously called the Future of the Preparations) is an informal, vital, and growing group that has emerged in the cultural/spiritual sphere of biodynamic agriculture.

Report from the Section for Agriculture

The Biodynamic Preparations in Context: Individual Approaches to Preparation Work (link is external)

The Section for Agriculture commissioned, directed, and published this study on the biodynamic preparations (link is external). It is particularly directed towards the International Biodynamic Association (IBDA), Demeter International (DI) and the Circle of Representatives of the Section for Agriculture, and especially their member organizations and their individual members. This publication (link is external) contains 14 case studies with comprehensive and easily compared descriptions showing how a selected group of people from across the world work with the preparations in their own geographical and social contexts. 

International Research Project:

Biodynamic compost preparation plants in and tropical and subtropical countries

At the science conference of the Section for Agriculture in Dornach in September 2018, the Section for Agriculture began a research project to discuss the use of plants for compost preparations in biodynamic agriculture and horticulture in tropical and subtropical regions, and to find new solutions where necessary. They met again in the International Working Group for biodynamic preparations in February 2019 in Dornach.

In the Agricultural Course (1924) Rudolf Steiner clearly stated that the plants recommended for making the compost preparations could be replaced by others, should they be difficult to obtain in some regions. Due to the spread of biodynamic agriculture from Central Europe to numerous countries across the world and, in recent years, to countries in tropical and subtropical regions in particular, new questions arise on this matter. Find out more here. (link is external)

"Only What Is Fruitful Is True"


Stewart Lundy of Perennial Roots Farm discusses assessing quality (link is external) of the preparations and the value of hands-on learning with Hugh Courtney of Earth Legacy Agriculture.

Janey Newton of Foxhollow Farm talks about what it means to practice biodynamics on the farm, and Laura Riccardi Lyvers explains the biodynamic preparations.

Wali Via of Winter Green Farm illustrates how the biodynamic preparations can be viewed as healing remedies for the Earth, as when working with the biodynamic preparations we are harnessing the life forces in a way that allows them to act as catalysts to enhance the health and balance of our farm. Read more.


Principles of Biodynamic Spray and Compost Preparations (link is external): In this book, renowned biodynamic expert Manfred Klett explores the preparations in depth, covering both the practicalities of spray and compost preparations and the philosophy behind them.

A Biodynamic Manual (link is external): Also a comprehensive introductory biodynamic farming book by Pierre Masson, with detailed information about making, using and storing the preparations, including photographic illustrations and diagrams.