The following reference guide or “greenprint” was developed to document and highlight the key issues that emerged from the Next Urban Giants convening, which was held July 30-August 1, 2019 in Seattle, Washington. The goal of this workshop was to bring together a group of 50 experts from a wide array of sectors, disciplines and localities to discuss how growing megapolitan regions can increase resilience and equity through urban greening. This multidisciplinary workshop was funded by a National Science Foundation Sustainable Urban Systems conference grant (#1929824) awarded to Washington State University in connection with NSF’s Dear Colleague Letter (NSF 19-032).