It wasnt meant for killing weeds.......I was talking about specifically using it for the folks who are wanting to grow "clover plots" but still be able to plant another crop like fall cereal grains into it without having to terminate the clover.....My thinking was that all you really need to be able to do is stunt the clovers top growth without killing the roots....Basically send it into a temporary dormant state......I figured the easy way to do that would be through "heat".....Clover is pretty tender and succulent so I thought maybe you could heat up the moisture in the plant enough that it would I suppose rupture the cell walls or something to that effect. Not sure if its possible but just an idea