In previous years, when I prepared and tilled the NE Garden Plot 1, I would get a green blanket of weeds before it was time to plant. Meant I would have to either hoe or re-till the garden! After a bit of research I learned about solarization. This involves putting a layer of plastic down for a few weeks to both heat the soil and kill the weed seeds. Often clear plastic is used but I ended up with black plastic and am just going with it. From my reading you can actually get soil temperatures up to 120 degrees with clear plastic after four to eight weeks.