sheet mulch contents

Planning a serious sheet mulch project to kill a lot of grass- is there anything to NOT include in sheet mulch specifically? I know I have access to rough wood chips, a county specific “compost” made out of waste, horse manure, chicken manure, and I’m looking into coffee grounds, spent grain from breweries, and crowd sourced grass clippings/dead leaves.

Sheet mulch is normally used as a straightforward green/brown setup. The grass is "green manure." The cardboard is brown (carbon). This is where it gets weird. On top of the cardboard, you want another brown. Sticks, twigs, aged wood chips, etc. Then alternate greens and browns. You can stop at putting grass clippings and other greens on top of the woody material, then cover it with compost or soil if you want to plant into it right away. As long as there is no toxic gick in any of your components, you should be fine. Just alternate green, brown, green, brown until you get the depth you want, then cover it with a final layer of compost. Or don't if you don't need to plant in it yet. Just stack them up and let them mellow. And don't forget to soak the grass and then the cardboard when you start. I mean, that cardboard really needs to be saturated. Wetting the grass first helps in that endeavor.

Jim