Titia Thun is the granddaughter of biodynamic pioneer Maria Thun. In 2020, Titia and her brother, Friedrich, took over the creation of the Maria Thun Biodynamic Calendar and the management of the family farm from their late father, Matthias. She lives in Dexbach, Germany. Friedrich Thun is the grandson of biodynamic pioneer Maria Thun. He undertook an agricultural apprenticeship at Arpshof biodynamic farm near Hamburg and in 2020, Friedrich and his sister, Titia, took over the creation of the Maria Thun Biodynamic Calendar and the management of the family farm from their late father, Matthias. He lives in Dexbach, Germany. Bernard Jarman worked as an apprentice on a biodynamic farm in Germany before running a hill farm in Botton Camphill Village, North Yorkshire. He was Executive Director of the Biodynamic Agricultural Association in the UK for fifteen years and continues to teach courses in biodynamic agriculture all around the world.

Bernard is the author of The Biodynamic Movement in Britain. He lives in Stroud, UK.