In its history of over a hundred of years, landscape architecture has developed many ideas, concepts, methods, and models. In this issue, LA Frontiers focuses on prototype studies by examining those traceable and repeatable landscape theories, methodologies, and pedagogies, and introducing the knowledge from allied disciplines to inspire knowledge innovation, with a particular highlight on the prototypes adaptive to future uncertainties. It hopes to extend the disciplinary horizon and enrich the fruition of disciplinary growth, and to provide designers and scholars with prospective design thoughts and more resilient working methods. This issue explores the following aspects: First, prototyping process, or test planning process, which is characterized for the test-planning-design process and has been widely applied in the fields of computer sciences and industrial design but still being less explored in landscape architecture. This process emphasizes the multi-disciplinary collaboration and test procedure before design, which would improve the communication efficiency among professionals from different fields. Second, reflection and innovation on classic theories and models in landscape planning and design, such as Ian McHarg's Map Overlay and Carl Steinitz's Six Steps model. Third, research-based design, including design research or competitions with clear goals and boundary conditions which help designers comprehend the essence and implications of design and encourage disciplinary innovation. And fourth, inductive and empirical pedagogies to inspire forward-looking design ideas and working methods.