Mushrooms come in waves called flushes. DMR's oyster folder counts three productive flushes with 8 to 10 days between them, and says the first is half the total or more. Paddy straw gives 70 to 90 percent of its yield in a first flush lasting three days. Button is picked almost daily for 8 to 10 weeks in seasonal rooms, or on a 60-day cycle giving six crops a year in controlled rooms.
Reset means emptying, cleaning and starting again. Spent bags go to a pit; a button room gets NHB's cook-out at 70 degrees for 12 hours; the room is washed and dried before refilling.