Biodynamic principles were first introduced in the US after 1924, when Rudolf Steiner first delivered his agricultural lectures. In 1938, the Biodynamic Association was established, making it the oldest sustainable agriculture nonprofit organization in North America. Still, there are only about 300 certified biodynamic farms in the US today, compared to 21,781 certified organic operations, representing a growth of almost 12% between 2014-2015, according to data released in 2016 by the Agricultural Marketing Service’s National Organic Program. This is the highest growth rate since 2008, with an increase of nearly 300% since the count began in 2002. The total retail market for organic products is now valued at more than $39bn in the US, compared to $75bn worldwide