Biodynamic farming is based on the teachings of Rudolf Steiner. The earth is a living being in relations with the cosmos. A good farmer has to assure the vitality of the soil with the right farming techniques.
There are many different cultural techniques to improve the quality of the soil: one way is to use composted manure that becomes a living soil. Using biodynamic preparations one can dig instead of ploughing the earth deeply.
We don't use any treatments on our plants, except the biodynamic preparations.