Most species of mushrooms will grow 2-4 flushes from the same grow bag. It is recommended to fully submerge and soak your colonised substrate (also known as a block) for 24 hours in between flushes, to hydrate the block. This will signal the mushrooms into fruiting again as they think it has been raining, and humidity levels will be right for them to start another flush. Be sure to remove all old mushrooms and stems before soaking the block as they can turn mouldy and infect your block.