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Faced with declining wine consumption and, more broadly, an unfavorable economic climate, the French vineyard must adapt to dual competition: that of New World wines (varietal wines) and that of “artisanal wines”, which are more environmentally friendly and driven by individual branding strategies. At the same time, climate change is altering production conditions, encouraging the emergence of new vineyards in regions previously considered unsuitable, such as Brittany. This study analyzes the creation of a Breton vineyard through the lens of territorially-based collective action, focusing on the dynamics of technical, commercial, and organizational innovations. The methodology is based on semi-structured interviews and participant observation, with the aim of identifying the actors involved in the emergence of the sector, their strategies, and the resources mobilized. The expected results include a typology of actors, a chrono-systemic timeline tracing the vineyard’s trajectory, and a better understanding of the innovation and territorial governance models under development.