How to prepare your sawdust grow bags
These three videos provide some sound information on preparing your own mushroom grow bags using sawdust as your substrate.
These and many more videos can be seen at https://www.youtube.com/user/jdjuergensen
Sterilization is one of the steps that make you successful as a grower do not skip this step, and make sure you allow the time needed for proper sterilization.
Spawning with your sawdust blocks.