Nature-based solutions (NbS) are garnering increasing recognition as a viable approach to urban challenges such as climate change, biodiversity loss, and social inequality. Nevertheless, the intricacies of NbS implementation demand an adaptive governance model that fosters sustained collaboration, learning, and innovation across a spectrum of stakeholders. This chapter delineates a method for assessing and bolstering the adaptive capacity of governance, drawing on empirical research from two case studies in Vienna, Austria, and Tucson, USA. The method is anchored in a thorough understanding of the attributes and interrelationships of key actors within governance stakeholder networks. We identify those actors who are most adept at disseminating NbS knowledge (KPP-Pos actors) and assess the diversity of essential actors for upholding network performance (KPP-Neg actors). Our proposed approach is designed to recognize and harness the strengths of key stakeholders to effectively address common issues in NbS implementation. This includes engaging key players to enhance coordination and cooperation at various organizational levels, maintaining focus on NbS to sustain public interest, discerning the dynamics that influence the implementation process, and optimizing the use of stakeholders’ knowledge of NbS. Through this empirical investigation, we validate the effectiveness of our method in practical settings, providing insights that are applicable to other scenarios confronting similar urban environmental challenges.