How do you gow shrooms?

Easiest and most consistent method is called the "PF TEK" method. If you google it you will get many good videos and writeups on how to do it. Basically it involves using 1/2 or 1 pint jelly jars filled with a sterilized growing medium (a 1:1 mixture of brown rice powder and vermiculite), which are then innoculated with spores. Once the white mycelium covers the entire cake, it is ejected from the jar into a suitable terrarium. Keep it humid and warm, and you will be tripping in a few weeks. It works, and it's the best method that doesn't require cow shוֹt.