Recent decades have witnessed the creation of new types of property systems, ranging from data ownership to national control over genetic resources. This trend has significant implications for wealth distribution and our understanding of who can own what. This book explores the idea of ownership in the realm of plant breeding, revealing how plants have been legally and materially transformed into property. It highlights the controversial aspects of turning seeds, plants and genes into property and how this endangers the viability of the seed industry. Examining ownership not simply as a legal concept, but as a bundle of laws, practices and technologies, this is a valuable contribution that will interest scholars of intellectual property studies, the anthropology of markets, science and technology studies and related fields.