Plant marigold with tomato for slug control !
I've got a horrible snail problem. I've used diatomaceous earth in the past, but the rain washed it away pretty quickly.
As a hempy grower, I happen to have a ton of used perlite hanging around at most times.
I had a thought the other day.... why not try perlite instead of D earth?
Sure 'nuff... worked like a charm. Sure... my strawberry patch looks like it was recently snowed upon, but the snails are GONE.