PRO-MIX HP Chunk Coir Mycorrhizae, 3.8 cu ftPRO MIX HP CC MYCORRHIZAE is a lightweight, high porosity peat based growing medium that contains chunk coir. It ensures optimum growth, especially when high air capacity and extra drainage are required. It is ideal for water sensitive crops, rooting cuttings and or low light growing conditions that contains a beneficial mycorrhizal inoculum (Glomus intraradices). These microscopic fungi attach to and colonize the root systems working in symbiosis