Common Roots is a system of shared plant-watering between homes that promotes meeting neighbors in a communal garden over a cup of tea. It provides each plant host with a real-time visualization of the community’s watering activities – who’s watering whose plant – and in doing so provides a gentle presence of the block’s inhabitants within individual private homes. It asks what novel ways we can design the cities of the future, given that people need more than simply to inhabit them.