The product (mature humus or natural fertilizer) COMPOST HELLAS, is based on the recycling of sea grass, that cast up on the coasts of the clean Greek seas, and selected products of agriculture and stock- breeding. The aerobic biological fermentation of sea grass with other organic substances, is absolutely harmless, for the humans and the environment and is madden without any chemical additional or process. The product has been proved effective for the well- balanced nourishment and health of the plants.