You are correct. Once it gets wet it becomes pretty ineffective.I always thought DE was to be kept dry? If wet it takes away it's effectiveness as I've always read. I'd like to know how well it works for you and against what bugs?
Agreed, I had to add an organic insecticide spray to the arsenal.You are correct. Once it gets wet it becomes pretty ineffective.
Not positive about this, But we used DE that was brown to clean delicate cotton couches with. You pack it on the couch and let it dry. then vacuum it off. If it's the same stuff, you can get it at a janitorial supply.What about the granular DE? It is not powder but 1/4" and smaller granules. It's kinda hard to find. I have heard from people using it that if you cover your topsoil, when you water it will dry out afterwards without becoming paste and will keep its effectiveness.