a "flush" is the production of mushrooms. When the first harvest is finished, take the cakes and throw them in some spring water for about 24 hours and put them back in the terrarium or whatever and get another "flush." Contrary to what that guy says, the second and third flushes are usually the best ones and do about 4 flushes, tops. I read in a book the other day that the fourth flush was always the most potent. Thats what the book says, not me! Dunk the cakes for 24 hours when you first birth them and roll them in vermiculite and spray the cakes lightly. You dont roll again after the next dunks.
Also, you dont have anything down! Doing it is alot different than reading about it. Good luck
www.shroomery.org (Check this site out, but ask around here and its a "unorganized dump")