It doesn't work, dammit. I tilled and hoed and pulled every weed in my flower beds and sprinkled the hell out of it with Preen and I still have a crapload of weeds. I hate pulling weeds. I bought a tub of this stuff and put down twice the recommended and it still looks like an amazon forest. I'm beginning to think the little yellow pebbles are just candy coated dandelion seeds. I should have had kids.