8-Pack Organic Sterilized Grain Spawn BagsOur best selling organic sterilized grain spawn bag was formulated by mycologists to maximize the speed and size of your mushroom grow. (All that's required is a spore syringe or liquid culture!) Each spawn bag contains our proprietary grain blend featuring hydrated, nutrient rich, organic millet and wheat berries. Bags also include a self healing injection port for use with a spore or culture syringe plus a 0. 2 micron filter patch to block airborne