The spatial continuity is necessary for the proper functioning of the city. The author noticed significant gaps in the model, ring-wedge green system of the Poznan city, which prompted her to initiate a series of conceptual designs that have been carried out since 2014 as part of green design classes with students of the Faculty of Architecture of the Poznan University of Technology. All the design concepts, especially Green Courtyards and Green Patchwork, concerned plots mostly owned by the city of Poznan. These were often neglected, unused or underinvested places. The students’ design concepts were not only study topics, but turned as public ones, they became the subject of wider social discussion. In comparison with the current state, they constitute the basis for further author’s research. The confrontation of the adopted design solutions with experts – landscape and greenery designers from Great Britain and Finland, during Gardenia fair at the Poznan International Fairs and the Arena Landscape conference (2020), induced reflection and conclusions presented in this article.