Super Shroom Final Fruiting Substrate, 5lb each – For optimal mushroom growth. Now with worm castings!  Perfectly blended to field capacity and ready to use. A specially formulated mix with Coco, Vermiculite, Gypsum and hydrated with Rocky Mountain Spring Water, Distilled water and PH stabilizers.
This is the ideal final fruiting substrate at your fingertips, all you need to do is mix with your spawned grain and watch the magic happen.