Mushrooms can be a difficult crop to grow. It is important to prepare a compost that can give the soil the nutrients it needs to encourage the mushrooms to grow to maturity. This compost is called a mushroom compost. It can be purchased or made from scratch. Making your own mushroom compost from scratch can be a bit tricky, but it will save you money in the long run.
Shovel manure into your compost bin. You can use either horse, cow or chicken manure. Make sure your compost bin gets a lot of sun so that it heats up.
Add hay and mix it in with the manure. This forms the base of your mushroom compost.
Toss some corn cobs into the compost bin to add nitrogen to the compost pile. Then add gypsum to increase the calcium levels within the pile. Mix these ingredients in with the base ingredients.
Let your compost pile decompose in the sun for three to four weeks.
Pasteurize your mushroom compost indoors. Place your mushroom compost in a sterilized room. Set up a steam machine in the room and turn it on high. The compost must reach a temperature of 160 degrees Fahrenheit to kill any living microorganisms within it. You can check the temperature every hour with a meat thermometer until it reaches temperature.