Phytosphere presents a new mechanism of sustainable symbiosis among an interdependent and mutually improving plant community. Six plant-machine hybrids, that are controlled by the 'intelligence' of plants, are empowered with new abilities for plants to take the initiative to explore and adjust their own surrounding environment and develop self-identity. As radical speculation, the project is seen as an innovative strategy for the evolution of plants and a trigger that provokes a critical reflection on the role and sustainable development for plant species in the ever-expanding man-made world.