How do I grow cordyceps militaris?

Cordyceps militaris is grown in jars on a sterilised rice and nutrient broth rather than on wood or straw. It needs sterile lab technique, a temperature of about 18 to 23°C, and steady light to form its orange fruiting bodies. It is slower and more demanding than oysters, so it suits growers who already have clean technique. It is valued as a functional mushroom.