Hello I heard chopped leaves and grass or mulch or hay and heavy black plastic? So far I have the chopped leaves and grass. What works best?
That might be a bit of an uphill battle. There are probably weed seeds in there right now that haven't germinated yet. Even if you were to cover the soil so that nothing blows into that area over the winter, whatever's in there now will still be there come spring. I'm in the habit of covering my raised beds with leaves every fall not for weed control, but to insulate the soil a little (which I've read) helps keep the microbes in the soil alive over the winter.