Planting a wildflower meadow for pollinators.
Here is a meadow publication that is helpful http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/non_HGIC_FS/TT-70_Fl...
Good prepration is necessary and weed removal. A good time to plant is spring. Begin by testing the soil. Here is our soil testing page, which includes links/videos of how to take a sample, and a list of labs which can complete the testing for you: https://extension.umd.edu/hgic/soils/soil-testing
Try to use native plants. Ernst Seed Company out of Pennsylvania has a nice selection of seed mixtures which can benefit birds and pollinators : http://www.ernstseed.com/