PRO-MIX HP Mycorrhizae Soilless Potting MixPRO MIX HP Mycorrhizae PRO MIX HP MYCORRHIZAE is a high porosity peat based growing medium ideal for water sensitive crops, rooting cutting and or low light growing conditions that contains a beneficial mycorrhizal inoculum (Glomus intraradices). These microscopic fungi attach to and colonize root systems to benefit plants by increasing water and nutrients acquisition (especially Phosphorus, Copper and Zinc). This symbiotic relationship between fungi