A peat soil amendment , consisting of leaves, small branches of plants, roots and other organic residues collected in the forests, mixed with the inorganic soil. It resembles a black spongy mass enriched in perlite and blond and black peat. Rich in organic substances and very fertile. It comes from the partial decomposition only of  the leaves of deciduous plants but contains organic substances that are not totally decomposed and is very light. Suitable for acidophiles, i.e. camelias, hydrangeas, orchids, azaleas, etc.