The depletion of natural resources and the urgency for sustainable alternatives have driven the exploration of biofabrication and nature-based solutions. In this context, mycelium-based materials have emerged as a promising avenue due to their regenerative potential and adaptability. Recent advancements in robotics and material science further enhance their applicability, opening possibilities for bio-integrated systems. This paper presents the Growing Futures Process, a mycelium-robot-human ecosystem that envisions biodegradable, adaptable habitats created through the collaboration of living organisms and autonomous systems. The project aims to create biodegradable, adaptable habitats built within an ecosystem where mycelium, robots and humans, collaborate to transform local food waste into biodegradable, adaptable structures through a new design and production process. It outlines the key research, experimentation, and prototyping phases that led to the concept’s development. Building upon a speculative future scenario developed within the MUSAE project, the concept evolved through four key phases: challenge exploration, inspirational research, idea generation, and concept development. The prototype-building phase was structured into twelve iterative steps, testing mycelium growth, sensor integration, and robotic interaction to optimize biofabrication in the ecosystem. Four experimental settings were explored: unconstrained growth, controlled casting, robots as nutrient dispensers, and ecosystem integration. By integrating biological intelligence, robotics, and material science, Growing Futures proposes a novel approach to construction, product design, and environmental restoration through co-creation with nature.