Abstract
Ecological resilience and further ecological and social outcomes of the resource system green spaces are endangered by a persisting economic growth logic manifesting itself in ongoing city soil sealing and urban sprawl, often linked to scarce public resources. Here, diverse forms of local self-organised and cooperative management of green spaces emerge that voluntarily take over important functions that previously have been provided by state or market actors. These social innovations can be accelerated by advantageous framework conditions. Cities advanced in the transition take up and support ideas emerging from such self-organised citizen groups.