I have the same issue. I was thinking clover , but I always see bumble bees in clover lol plus we have lots of rabbits in our area. We are going to try to work with the grass this year ( we've only been at this house for one summer so far) because the way our yard is set up we could not get a machine back there and would have to dig up the lawn ourselves to put down wood chips etc. so it's worth it to try for us lol!