Earlier today, I noticed a lot of small tiny flies emerging from the Chinese Evergreens I purchased last weekend.
At the time, I just had my freshly ground and used morning coffee beans... so I tried dumping the grounds in a layer on top. This seems to have solved the flies problem. (And I do like the smell of coffee!)
Should I just leave it there? Should I try to remove the coffee grounds? Is this actually a good sustainable pesticide and/or fertilizer?