Growing mushrooms from spawn requires understanding of the specific processes and nuances associated with mushroom growing.
We highly recommend learning as much as possible from a wide range of sources to achieve the best results possible. There is great information all over the internet, fantastic YouTube videos and many good books. Spawn will not be replaced if you have poor results as this is the exact same product we use in our farm and do not have any issues associated with it.
Proper equipment and or technique is essential when growing mushrooms, Grain spawn is a buy at your own risk product.