"Biodynamics is a spiritual-ethical-ecological approach to agriculture, food production and nutrition. Biodynamics was first developed in the early 1920s based on the spiritual insights and practical suggestions of the Austrian writer, educator and social activist Dr. Rudolf Steiner (1861-1925), whose philosophy is called â€œanthroposophy.â€ Today, the biodynamic movement encompasses thousands of successful gardens, farms, vineyards and agricultural operations of all kinds and sizes on all continents, in a wide variety of ecological and economic settings.
Biodynamic farmers strive to create a diversified, balanced farm ecosystem that generates health and fertility as much as possible from within the farm itself. Preparations made from fermented manure, minerals and herbs are used to help restore and harmonize the vital life forces of the farm and to enhance the nutrition, quality and flavor of the food being raised. Biodynamic practitioners also recognize and strive to work in cooperation with the subtle influences of the wider cosmos on soil, plant and animal health."
So yes the basics of biodynamics are very much what I do with very diversified plantings, closed loop composting, no synthetics. But once they get out into that "subtle influences of the wider cosmos" stuff, it goes all woo-woo and loses me.
"Loosely biodynamics can be broken down into the following areas:
1.The use of two field sprays, BD 500 (horn manure) and BD 501 (horn silica).
2.The use of five compost preparations that are healing herbs added to the compost heap.
3.The use of a planting calendar that gives clear indications when to carry out tasks in the garden.
If we look at point three for a moment longer, the planting calendar, we see that from a combination of Steinerâ€™s work and that of the German farmer and grower Maria Thun, who produces a planting calendar annually, there has arisen a correlation between the various different parts of the plant and the signs of the zodiac.
Staying with this we start by looking at the four elements that nature so graciously provides us with â€“ earth, air, fire and water. Then lets match each element to a part of a given plant â€“ earth to root, air to flower, fire to fruit and seed and water to leaf. Now letâ€™s match each of those parts of the plant along with their element to the twelve signs of the zodiac. Then we can see that as the moon moves through each of the twelve on its 27 and a bit day journey around the earth every month it will influence those parts of the plant relating to the zodiacal sign e.g. Pisces=water/leaf, Capricorn=earth/root. " https://www.biodynamic.org.uk/farming-am ... ening.html
So they have a rigid planting calendar based on zodiac signs.