Straw is cheap, but untreated straw is a race between your mushroom and every mould in the field. The treatment you choose decides who wins.
- By the end you can choose straw, chop length and moisture for oyster bags.
- By the end you can compare hot water, steam, chemical and sterile methods by cost and risk.
- By the end you can list the free hygiene steps that stop contamination before spawning.

