A couple of years ago I had a ground bee nest behind the fence near one of my roses and they would get agitated every time I got near that rose. I didn't get close enough to determine what kind of bee they were since they were on the slope side of the fence.
I decided the rose was on its own for the season, because the bees move their next every season, and just placed the sprinkler under the rose at night to water it and didn't bother to dead head it that year.
The rose was fine and so was I. I just let the bees have their nest. It wasn't worth trying to get up on the slope and trying to find the nest to get rid of them.
So far, I haven't had to worry about hornets. We do have them, but they haven't built a nest on my property.
