SunGro Horticulture Black Gold Sunshine white perlite granules are the result of the expansion of combined water vaporizing in the crude mineral and forming enclosed air pockets Great quantity of air in these pockets, the product is very light and has excellent physical qualities for use in plant propagation The physical properties of the product also further enhance its use in horticulture It is inert, sterile, safe to handle and has no odor Available in 30 units per pallet As a soil conditioner perlite is used to improve aeration and drainage along with nutrient and moisture retention Its moisture and nutrient retention capabilities and lightweight characteristics make it an excellent sterile medium for starting seeds and rooting cuttings Perlite does not degrade in time, making it a long term answer to many gardening problems Use for starting seed, rooting cuttings, or storing bulbs Also a necessary ingredient for making hypertufa planters