Perlite is a lightweight, organic soil amendment that can be used to improve drainage and aeration in potting mixes. Perlite encourages strong root development by helping to prevent soil compaction. Perlite has a neutral pH and it is sterile and weed-free. Perlite can also be used alone as a medium for hydroponics or for starting cuttings. Use to improve drainage and aeration in potting mixes Helps prevent soil compaction to improve growing conditions Organic and registered with the Organic Materials Review Institute (OMRI) for earth-friendly gardening Weed-free soil amendment improves soil without adding unwanted ingredients