Garden Natural Stones River Rocks Decorative Pebbles For Vase Aquarium 2kgThese natural stones are non toxic and eco friendly river rocks. Their natural attribute will make them last longer because they will not deteriorate like mulch does. Common applications include flowerbeds, groundcover, decorative concrete topping, or walkway paving. Decorative rocks are a permanent and cost effective alternative to annual wood mulching. MANY USES If you want to add extra beauty in your garden, lawn and even to your potted plant or