The bees do love it, but here in WI it is a noxious weed & if neighbors start complaining the county will come & spray it then send you the bill. The problem is that is spreads like wildfire..long distances too because those seeds fly really well. If I were you, I would let it bloom, but as soon as the flowers start to fade mow it way down, so it doesn't have a chance to make seeds. Actually if you mow it, you may get a second, even third set of blossoms. I think if anyone questioned you & you explained that you are managing it for your bees & not letting it go to seed, no one would mind. Good luck!!