I am having the same problem with slaters and thought the coffee grounds would be a good way to go. I placed as much as I had around the plants but then ran out. I then remembered that there are a lot of coffee grounds in my worm beds, as they love them so I went to steal some, when I picked some grounds up, lo and behold.......100's of slaters living below and amongst the coffee grounds!!! next attempt will be eucalyptus oil and dishwashing liquid sprayed on the ground
