Data for: Annual cover crops for managed and wild bees: Optimal plant mixtures depend on pollinator enhancement goals

Data on flower density and bee visitation rates to different plant treatments (cover crops and wildflower plots) over two years, 2016 - 2017. Data are presented per sampling period, and averaged/summed across all sampling periods within a year. Also included is a dataset on plant-pollinator interactions within treatment plots and in the surrounding grassland landscape, with plants and pollinators identified to species. Finally, included is a dataset used to analyse whether different bee morpho groups displayed different treatment preferences.