There is growing interest on composites which are produced using natural materials that improves the properties of composites and support the green economy. In this research, five different compositions were made, using polypropylene, organic clay, oat and wheat husks. The compositions were artificially aged up to 800 hours. Tensile modulus for composites decreased by 17 % while for pure polypropylene it decreased by 43 %. The Charpy impact strength showed lower decrease in strength for hybrid composites (15 %) than it was for composites made with wheat and oat husks, where the decrease in strength was 44 % and 21 % respectively. The aging had almost no impact on crystallinity, there was a slight change, up to 5% for composite materials.