Product Review

The porcini mushroom is the most nutritive valuable among all edible mushrooms. 1 package of grain mycelium is intended for 10 ft2.

Instruction how to grow Porcini mushroom:
Mushrooms grow in symbiosis with a tree. Rake the soil under a tree to form a hole of 2-6 inches is depending on the location of the roots near the soil surface. Spread the mycelium evenly over the entire raked surface. Cover with backyard (or forest) soil mixed with any humus in equal proportion. Watering can at the rate of 1 gallon per 5 ft2. 
Sprinkle the ground that was formed during the raking. Cultivation can be done at any time of the year and under any tree species. In a dry period, watering should be done using a watering can at the rate of 1 gallon per 2 ft2.   
Mushrooms appear 4 times a year - 2 times in the spring and 2 times in the fall, but for the first time no earlier than 2,5 months after cultivation. The first harvest will be 10-15 oz./ 10 ft2, and then 5-10 lbs./ 10 ft2.
The mycelium grows until tree lives.  
Indoor, you can try to grow mushrooms in the same way as champignons, but the results will be much worse than on the backyard. The germinating capacity probability will also reduce.
Amateur cultivation of mycorrhizal and other soil mushrooms doesn't give a guaranteed result because the harvest of mushrooms depends so much on the weather and many other factors. Nevertheless, if you "get your hand in it" and gain enough experience in the cultivation of mycorrhizal mushrooms, as well as with certain zeal, you can expect good results.  
Attention! A very important factor for the successful cultivation of mushrooms is the acidity of the soil. For this mushroom, the optimum acidity is Ph = 6,5 - 7. A more acidic soil (Ph is less than mentioned) must be deoxidized with a solution of quicklime (at the rate of 3 of lime per gallon of water per 10 ft2). 

Happy harvest!