Retail Products--> Canadian Soil --> Perlite   Product Desc Perlite is one of the original soilless mix components used to formulate professional growing mixes. Perlite is a mineral that pops like popcorn when heated, forming lightweight particles. As the percentage of perlite in a mix increases, water retention is reduced and aeration increases. A proper balance of air and water encourages strong root development for healthy plants. OTHER INFO Available Sizes 8 qt.