well I myself have not grow shrooms yet, but my grow bag, and spores are coming in. I used Innersight trading outta Canada ( Spores 101/Mushboox.com), they seemed pretty reliable so far. I believe that with the right conditions, it takes up two weeks or longer to get the mycelium to start growing and then, about another month before you can start to harvest fruits from it, but once you get it fruit you have a few cycles to harvest from and it will be about 2 month before your first harvest. I cant wait till I get to start growing, I'm not even gonna do them but I'm gonna help my friend grow em.