Check the listing for details. PREMIER HORTICULTURE PRO-MIX HP Mycorrhizae High Porosity Mix, 2.8CF (2 Pack). Condition: New. Listed at 75.56 USD. Premier PRO-MIX High Porosity Mycorrhizae is the growing medium that increases resistance to stresses, and gives you the results that you need!Key Product FeaturesYou will receive 2 (2.8CF) bags per orderMYCORRHIZAE improves fertilizer uptake, increases the resistance of plant to stresses, increased root mass, flower production, plant size, yield and improves water uptake and increased drought resistanceWell suited for low-light growing conditions and high humidityMore difficult to overwater cropsReduces incidence of water related problems (root diseases, algae and fungus gnats)Holds less water for improved leaching of fertilizer salts during crop cycle With its high perlite content, PRO-MIX HP provides a great growing environment to growers looking for a significant drainage capacity, increased air porosity and lower water retention. The added benefit of fibrous peat moss and coarse perlite makes this formulation ideal for growers who require a superior-quality product adapted to their needs for watering flexibility and crop seasonality. Pack of 2.