0af6c64d_biodynamic_wine_guide__Mixture
[Preparation] 501 [Use] Spray a dilution on vine leaves to aid photosynthesis, and colour, flavour and health of grapes. [Frequency] up to four times per year in early morning. [Mixture] 
Ground quartz rocks (silica) dynamised with water, placed in a cow horn, and buried in the vineyard over winter.
biodynamic wine guide
Mixture