One guy was tellin me he adds vermiculite to his plants when he waters he puts it in the water and when he pours it in that mixes it with the soil. The 1st time I'd heard of anyone doin it like that. I use the vermiculite to help with drainage mostly I put a layer of soil then a layer of verm. then fill the pot up with soil. I'm talkin like enuf to cover the layer of soil I put down I don't get krazy with it.