Over the last three decades, PPGIS practices have shifted from a paper to digital format and have become cheaper, more user-friendly, and more versatile. The literature recognizes the potential of PPGIS, but researchers also note that the impact of PPGIS in practice is not yet pronounced. This study seeks to identify the barriers that hinder the widespread adoption of PPGIS in planning practice. Building on the literature, an analytical framework is developed to identify three main categories of barriers and their respective subcategories. This analytical framework is complemented by the results of five workshops with practitioners on the use of PPGIS in planning for green open spaces. This mirroring of literature and empirical data clarifies which (sub)categories are actually perceived as barriers and which are not. The findings show a shift from epistemological and technological barriers to cultural barriers that involve institutions and participants. While each of the three categories can start or stop a PPGIS process, having a pioneer in at least one category can aid in overcoming the remaining barriers. •Technological and epistemological barriers are no longer the main pitfalls for adapting PPGIS in practice.•There is a dissonance between literature's barriers and what practitioners perceive as such.•Human barriers, e.g., culture, trust, and willingness, are key to PPGIS's widespread adoption.•Having a champion in any category can help overcome the other barriers.