The ENABLE project has compiled a series of approaches and tools to support the implementation of urban green and blue infrastructure (GBI), learning from the experiences of knowledge exchange among scientific experts and urban practitioners in various European cities. Biodiversity and ecosystem services can provide many benefits to urban citizens. The ENABLE interdisciplinary team of scientists has been engaged in dialogue with policy makers, urban planners, landscape designers, civil society initiatives and citizens, to make sure that their research work benefits and has an impact in cities on the ground. Their knowledge, best practices and key methods for interaction and delivering impacts have been captured in this policy brief, to give practical guidance to policy makers to facilitate the successful implementation of green and blue infrastructure in cities.