Plant Revolution Orca Premium Liquid Mycorrhizae is a cutting-edge liquid microbial product. The mycorrhizae build a microbial system in and on plant roots which enhances water and nutrient uptake. This concentrated and diverse mix of mycorrhiza and beneficial bacteria is designed to be watered in or run through hydroponic or irrigation systems. Orca is an easy and effective way to treat your existing plants, landscapes, and gardens.