Shiitake mushrooms are the second most commonly consumed mushroom in the world due to their delicious flavours and their immune supporting properties. Shiitake is a strain of the Shiitake mushroom commonly used by indoor cultivators because of its high-yields on supplemented hardwood fruiting blocks. Nearly all Shiitake mushrooms available for purchase are cultivated on either hardwood logs or hardwood supplemented sawdust blocks. They are also found growing throughout the warmer climates of East Asia in clusters on decaying wood – primarily deciduous trees.