Big Foot Mycorrhizae Concentrate is the water-in version of our mycorrhizae, and great for watering in to established plants, greenhouses, and hydroponic setups. Revitalize your plant’s soil without transplanting – along with viable endomycorrhizae, Big Foot Concentrate contains these beneficials: Worm Castings, Kelp, Azomite/Micornutrients, Biochar, and Humic Acid