Following the foreseen activities of Action A3, pistachio wastes were composted with other raw materials (straw, manure, zeolite) at a pilot field in Aegina. Three composts (two widrows and one pile) were prepared, two of them by using pistachio wastes, manures and straw while the third by using also clinoptilolite (natural zeolite). The composting experiments started in November 2013.