I have planted many bee attracting plants and boy are they working. I also (by accident) grew a HUGE native yellow flowering plant nearby my garden area and it's become a BEE motel.

I have basil all around in my garden as well that they just love too.

My question is, how (if at all) can I set up a safe place for them to nest? or is that even reasonable? I have all kinds of bees, all different sized bees all around in these plants all day long.

here's a video I took with my camera.