How to Make Vermicompost. David Clairemont demonstrates how to use special type of worms to help the composting process. They eat twice their weight a day so the help will be fast. Ingredients to put that together are: a couple inches of grass clippings, place it to the bottom of the plastic container with holes for drainage and for air worms. Then David puts a layer of cured horse manure (not cow manure!) about the same thickness. The next things is red wiggler composting worms. The next item is kitchen scraps (no meat scraps!) and on top of that garbage he spreads some peat. And make it all moist but not wet with water.