Ligtermoet, E.Pauli, N.Martinus, K.Ramalho, C. E.2026-01-022026-01-020169-2046WOS:001465132000001ORCID:/0000-0002-1556-9668/work/189802770https://hdl.handle.net/1885/733802175Understanding how social networks facilitate the adoption of marginal urban greening actions can provide valuable impetus to guide transformative change in urban landscapes, which are under multiple social and environmental stressors globally. Social network mapping of resource flows, particularly information sharing, is one tool for understanding the emergent and transformative urban greening practice of landscaping roadside verges with native and/or waterwise plants. Urban roadside greening in Perth, Western Australia, while formerly prohibited, is now increasingly accepted and advocated for by multiple sectors, as a nature-based solution that provides multiple ecosystem services and social-ecological benefits. This study drew on participatory stakeholder mapping to examine the stakeholder network of non-residential actors connected with verge greening. Using social network analysis, we found almost 80% of resource flows across a large network of diverse stakeholders were information related. We identified top providers, recipients, brokers, as local and state governments and peak bodies, and, to a lesser extent, key individuals, community groups, nurseries, residents and environmental consultants and developers. The network was characterized by four dominant and five smaller communities, which we classified into a typology based on composition, structure (quantitative material), and contextual knowledge, including function, dominant roles and responsibilities (qualitative material). These were the 'planning and development hub', 'governance enablers', 'water efficient hub', 'greenspace hub'. The five smaller communities were 'advocates', 'transformers', 'new vision', 'local networks' and 'early adopters'. The network analysis provides evidence of communities that transcend traditional sector or actor silos, commonly converging around local governments as key knowledge brokers.We would like to thank all the participants interviewed for this work for their time and knowledge contributions. This work was funded by the Australian Government through the [remove for double blind peer review] and undertaken with human ethics approval from the University of [removed for double blind peer review], 2019/RA/4/20/4465 . Thank you to [removed for review] for preparation of the context map ( Fig. 1 ). The authors thank three reviewers for their thorough comments which significantly strengthened the manuscript. We acknowledge this work was carried out in Boorloo, on Wadjuk Noongar Boodjar. We gratefully acknowledge the continuing dedication of Wadjuk Noongar elders, sustained over generations, to care for Boorloo and keep Country and Culture strong, through the changes wrought by colonisation. We would like to thank all the participants interviewed for this work for their time and knowledge contributions. This work was funded by the Australian Government through the National Environmental Science Program's Clean Air and Urban Landscapes Hub and undertaken with human ethics approval from the University of Western Australia, 2019/RA/4/20/4465. Thank you to Dr. Eloise Biggs for preparation of the context map (Fig. 1). The authors thank three reviewers for their thorough comments, which significantly strengthened the manuscript. We acknowledge this work was carried out in Boorloo, on Wadjuk Noongar Boodjar. We gratefully acknowledge the continuing dedication of Wadjuk Noongar Elders, sustained over generations, to care for Boorloo and keep Country and Culture strong, through the changes wrought by colonisation.14en© 2025 The Author(s)Information flowsParticipatory stakeholder mappingSocial network analysisUrban environmental planningUrban greeningVerge gardening202510.1016/j.landurbplan.2025.105342105001984073