Urban greenery fulfils a number of useful roles, helping, among others, to achieve aesthetic and ecological goals. Studying diverse aspects of its existence in urban areas requires an interdisciplinary approach. The presented paper aims to analyse the possibility of using greenery to modify the perception of the scale of urban spaces. The methods used are case study and a field query realised by architecture students at the Poznan University of Technology in the Poznan County in 2017. The main research results include defining the three degrees of urban space scale that occur in the Poznan County as well as indicating the possibilities to influence their perception through the use of greenery.