I really love this idea, would like to incorporate in the stone in the basement area instead of mosaic risers - I've re thought this and think may be too overpowering. Thinking tiled risers and small pebble mosaics in floor would be much nicer.
Salvias (the purple flower in the photo) are one of the best groups of flowers for honeybees and bumblebees. White Fence And Flower Bed With Pink Roses, Salvia, Sage, Catmint And LadyS Mantel. This is going in my yard down the fence - Home And Garden