Mycorrhizae is a symbiotic association composed of a fungus and roots of a plant. Both beneficial fungi and bacteria are absolutely crucial to a gardeners success not only in soil but also in hydroponic applications. Leading the way with mycorrhizae products is Xtreme Gardening. They make adding this crucial component a piece of cake and offer sizes to fit every growers needs. Along with there mycorrhizae products, they offer convenient compost tea "brew-bags" allowing you to simply and quickly start brewing your own compost teas, a holistic and easy to use all natural fertilizer.