Therm O Rock RP35CF Perlite in Poly Bag, 3.5 Cubic Feet (Discontinued by Manufacturer)
This lightweight perlite provides superb aeration and moisture retention when mixed in with other soil materials. Perlite supports root growth and retains moisture, air and nutrients which it releases as plants grow. Also suitable for hydroponic greenhouses. Available in 3-1/2-cubic feet poly bag.