I've heard of burying eggshells or banana peels directly under rose gardens to make them flourish (some may remember Annette Bening's smug response in
American Beauty when asked by her neighbors why her roses are so gorgeous: "Eggshells and Miracle Gro!" Of course, there was symbolic meaning to that line as well, but eggshells are legitimate in the garden, I hear.)
But aren't we really talking about composting here? Wouldn't you take the peels, coffee grounds, eggshells, etc., let them decay, and then put them in the garden as compost?
If not, then what is the benefit of burying single, non-composted items?