Environmental descriptors including landscape and focal genetic diversity metrics for 35 landscapes across Sweden, Germany and Belgium in which the grassland perennial plant species Galium verum was sampled. Besides the descriptor "Landscape" making it possible to link these descriptors to the individual ramets in RawMicrosatelliteData.txt and IndividualDescriptor.xlsx, environmental descriptors include structural and inferred functional connectivity and various components which make up the green infrastructure, i.e. amount of semi-natural grassland habitat [ha], amount of road infrastructure [m] and the amount of forest or arable cover [ha]. Further landscape information is provided by the descriptors on "Landscape occupancy of Galium verum" and "Restored", informing on the abundance of Galium verum in the landscape surrounding each focal semi-natural grassland patch [0-1] and whether the focal semi-natural grassland patch has been restored [0/1], respectively. Genetic diversity metrics for sampled Galium ...