Ready to use substrate! Just add spawn, and zip-tie or heat seal the very top of the bag! Gently shake the bag after sealing to mix spawn evenly into substrate. Try to even it out on top and let it sit for 2- 4 weeks! Recipe contains Coco coir, Vermiculite, Wheat straw, Urea, azomite, and magnesium sulfate. Processing time - 3 - 5 business days