Your mushroom kit can produce anywhere from 0.5 to 1.5 kg (1-3 lbs) of fresh mushrooms over its lifespan. The amount depends on many factors including: which species of mushroom you are growing, the growing conditions you provide (each mushroom species has its’ own optimal range of temperature, humidity, air exchange and light), and if you have the patience to fruit your kit a second, third or fourth time.  (Generally the first harvest is the largest, with subsequent crops being smaller and smaller until the kit has used up its food resources within the bag.) Of course your kit has the potential to produce abundantly more mushrooms through expansion into bulk substrates or logs (ie. feed it more food). See “How Can I Expand my Kit” or have a look through the tutorials on the website to learn more!