If the municipality does not give us permission to plant trees, or if we do not feel like getting lost in the mazes of bureaucracy, we can choose guerrilla gardening, which is also known as unlicensed planting. However, the types of trees or shrubs planted this way are typically less likely to be long-lived. For this reason, guerrilla gardening is most suited for annual flowers and small bushes. And where? It is worth exploring bleak, negligent urban corner areas to grow a few nice flowers, in which case it is of course not enough to merely plant them , but their further care is equally important. Additionally, make sure that you keep away from planting invasive species.