I have a patch of weeds on my front lawn about 2'x3' which I would like to cover in sod. I tried pulling the weeds and other plants but they just keep coming back. I want to solve this problem soon so I can lay some new sod over this spot. I bought some killex but am hesitant to use it because I have kids. I heard you can cover the area and anything under it would die. Do you use newspaper or plastic to cover and how long do you have to leave it there? or should I just killex, anyone know?