Mushrooms need adequate humidity and ventilation to survive and thrive, so proper care is important. You should water a minimum of once a day, spraying the outside of your block over the sliced area. If you live in an area that has low humidity, are growing during winter months, or notice that your fruiting block is dry, water more frequently or create a humidity tent.
Note: Shiitake blocks have different humidity requirements. Please follow the shiitake-specific directions.