Mushroom substrate large kit contains 1200 ml of sterile substrate for mushroom cultivation. This substrate kit is designed for the needs of the cubensis mushroom. You add the spores and grow whatever strain you like. We recommend to use liquid culture for a better development of the spores, it comes with the kit. Needs spores? Adding spores will get you an extra 10% discount. Just add a spores syringe / vial to you cart for the discount to apply. You`re in control. Grow your own magic!