Fertilome Horticultural Perlite is a high quality additive that is permanent, clean, odorless, non toxic and sterile. It is also very light in weight, easy to handle and easily mixes with potting mixes and soil. When combined with peat, Perlite promotes drainage and air capacity. As useful to the home gardener as it is to the commercial grower. It is used with equal success in greenhouse growing, landscaping applications and in the home for house plants.