•A diachronous approach to study of community gardens has been employed.•The methodology consists of participatory observation and semi-structured interviews.•Gardens in socialism are seen as a continual of rural practices in an urban society.•In post-socialism they are seen as an example of communal involvement.•Visual characteristics of community gardens changes in two contrasting periods. This paper provides an in-depth analysis of community gardens in a (post)socialist setting during a time of key changes in their perception and management. Community gardens in Zagreb emerged in two specific economic and socio-cultural contexts and a diachronous approach to the study of urban gardens offers a unique insight into differences and similarities reflecting and contrasting those periods. Semi-structured interviews and non-participatory observation were employed. Results show that community gardens in Zagreb are multilayered places which satisfy diverse needs of the urban residents, including home grown food, socializing, recreation, contact with the nature, and supplementation for low pensions. They can also be seen as examples of heterotopias or alternative spaces during both examined periods. In the socialist period they were secluded, private, pseudo-rural places in a semi-authoritarian, communal, and (supposedly) urban and industrial society. In post-socialist Zagreb, characterized by an uncontrolled and unplanned spatial context reliant on neoliberal market-oriented principles, social insensitivity and exclusion, the new gardens are depicted as beacons of communal involvement, grassroots movements, and the ability of citizens to stand together and make their voices heard.