Coffee grounds as slug/snail repellent?
Has anyone ever tried this? I understand that caffene is toxic to snails and slugs and have heard of coffee spray being used to control them. What about just top dressing with coffee grounds? Is there still enough caffene in the grounds to have much effect? I'm planning to try it out since the coffee grounds are good for the garden and provide nitrogen anyway but I was wondering if anyone has noticed their effect on snail/slug problems.