I discovered this nest a few weeks ago, when I went to retrieve a pot from my stacks of pots piled in the secluded corner of my house (I also have lots in my shed, but that is a long way to walk, so I leave some near the house also). The pots were piled upside down, and I could see the wasps flying in & out at the base of the stack. At the time, I used a long pole to flip the pots over, and sure enough, a dozen or so wasps came buzzing out, and I could see the nest inside a large paper-based pot:
I rarely if ever have used any chemicals on any sort of pest, but this time, I didn't see much choice. If I were ever to retrieve any pots, or any kids were to run into this area, it could be a disaster. So I bought a can of Raid Wasp Killer, and sprayed down the nest quite thoroughly. I sprayed it again that night, just to be sure. Then have been watching it ever since, but there is no sign of activity.
I think I'll leave the pot there on display. I understand that wasps are territorial, so a sign of a nest already there (especially a poisoned one), may be a deterrant to other wasps who may get the same idea.
