Posted: Mon Jul 5, 2021 12:59pm
I've had exactly the same problem for a couple of years, they gather around the metal ladder in my pool, and I've researched all sorts of solutions, none of which work! These included plants whose aroma they don't like, a bucket of water nearby to give them an alternative drinking venue. Last year I tried taping a brown paper bag in wasp nest shape to the ladder, this is supposed to persuade them that another colony is already there so they shouldn't trespass on their territory. My wasps had clearly never heard of this!
I'm thinking now of a big aerosol of wasp repellent and giving them a squirt every time they turn up, suitably dressed in protective clothing of course.
If anyone has a workable solution, I'd love to hear it.