In the context of the agroecological transition, the ability of alternative ways of farming to develop themselves in the long run without being co-opted by mainstream input intensive agriculture is essential. Biodynamic farming (BF), which began a century ago in 1924, was one of the first alternatives to modern agriculture, associated with specific agricultural practices, worldview and human-nature relationships. Over the last 100 years, BF has developed worldwide in a context of growing industrialization, without becoming industrialized itself, and it is still considered today as a radically alternative way of farming. To better understand the resistance of BF, this paper provides an overview of its history, with particular emphasis on its complex relationships with the broader organic agriculture (OA) movement. Three overlapping historical stages are distinguished: (1) Agronomic consolidation stage: from Rudolf Steiner’s agricultural courses to the first “Agricultural Experimental Circle”, the creation of the Demeter label and the emergence of OA (first half of 20th century); (2) Institutionalization stage; Initially, BF was coevolving closely with the growing OA movement, but then the differentiation between both progressively increased. Meanwhile the first collaborations with academic research institutes were initiated; (3) Expansion stage: With growing commercialization opportunities for biodynamic products, the 21st century corresponds to a stage of economic development for BF and a new wave of geographic expansion in every continent. In the final section of the paper, the implications for sustainability transformations are discussed. Particularly, it is argued that the ability of BF to combine strategies of agronomic consolidation, institutionalization and expansion over time could be the key to its resilience. The complementarities between BF and other alternative ways of farming might play an important role in future evolutions.