This past season I planted a few perennial salvia into a front garden bed. I couldn't believe how many mason bees came to visit the flower spikes! My neighborhood was built onto former cattle grazing land: very flat, lot of invasive grasses, lot of native species gone from the area. I was very pleased to see these natives come around and stay right up until the cold temperatures came.
Does anyone have any other suggestions of plants that attract native bees?