The soft, corky and flat Reishi mushrooms are one of the oldest medicinal mushrooms known in our world. Appearing to look like it has been red-varnished, the cap features an underside of white pores containing fine brown spores. The enchanting Reishi grows at the base and stumps of deciduous trees to form a picturesque storybook scene. With such recognised herbal healing powers, it is nice to know that the Reishi mushroom is also an incredibly easy mushroom to grow.