Of course I always remember things I meant to say after I’ve finished. The words I was searching for are mycorrhizal fungi. Also, you can include grass clippings and garden waste as long as it isn’t weedy or twiggy and I prefer not to add eggshells as they take forever to break down, nor onions which have a tendency to be slimy and smelly. By turning the compost regularly you speed up the composting and deter mice from nesting. They hate being disturbed.