The contents of king oyster mushrooms bags are sawdust, corn flour, soybean flour, barley bran, lime and calcium carbonate. Contents of shiitake bags differ depending on how you want the mushrooms to grow. It takes judgement to decide what to add in the bags, and the judgements are cultivated by experiences; therefore, what is in the bag is a secret every mushroom farmer keeps.
There have been more mushroom farmers devoting themselves in growing king oyster mushrooms and their skills are improved, and thus, the profit is lower than before. In making shiitake bags, before inoculation, they have to sterilize them. When opening the bags, the bags have to go through sterilization again to assure contamination-free. Every process takes effort so that the shiitake bags can maintain their high quality. To lower the failure risks and costs, Ren He Farm started making the bags by themselves to keep close tabs on their quality. They modulate sterilization and the process of inoculation. They go on tours of warehouse inspection three times a day to see if the facility maintains operational and to assure the temperature and humidity are the most proper for king oyster mushrooms to grow. These are details that they acquired and adjusted based on the need of their own farm environment. Experiences help lower failure rate.