Black Lava Rocks Sand

12 LB Black Lava Rocks Sand for Plants, Potting Soil Decorative Landscaping Gritty Pumice, Crushed Volcanic Stone Gravel for Bonsai Succulent Cactus, Top Dressing, Vase Filler, Fairy Gardening. The convenient sized tiny horticulture rock sands fit for orchids, succulents, cacti and bonsai trees, etc., if you are looking for fine ways to keep your indoor plants alive without over watering, it is a good idea to get these.