This paper investigates sustainable alternatives to traditional polystyrene (EPS, XPS) foam for computer numerical control (CNC) model making in landscape architecture education. Focusing on materials such as cork, recycled cardboard, mycelium, and soap, the research employs a systematic approach involving material identification, testing, and performance evaluation. The study assesses factors such as machinability, biodegradability, and recyclability, aiming to align with sustainability goals. The research works to contribute guidelines and strategies for sustainable digital fabrication in landscape architecture education, fostering environmentally conscious students, educators, and practitioners in not only what we do, but how we do it.