Biodynamic wines are organic wines made following the lunar calendar and the naturalistic beliefs of Rudolf Steiner.
It is a holistic concept - looking at the whole ecosystem through cycles and energy. The goal is to enhance the natural life-flow cycles of the vine and especially its immune system. Memorable processes in biodynamic vinetending include using cow horns to hold the silica which will be buried in the soil and applying specific herbal sprays on precise days.
There is a dose of non scientific magical thinking in biodynamic processes. But as one of my winemakers put it "it doesn't make sense and I feel silly doing some of it, but my vines look healthier"