FIELD: agriculture, mushroom growing. ^ SUBSTANCE: invention relates to methods for growing Polish mushroom mycelium, Boletus edulis, and can be used in artificial growing Polish mushroom, Boletus edulis. Method for growing Boletus edulis mycelium involves seeding Polish mushroom basidiospores, Boletus edulis, in nutrient medium, their incubation up to formation the primary mycelium. The primary formed mycelium is removed and added its in capacity with nutrient medium and incubated under dark condition at temperature 20-24oC for 30 days up to formation mycelium on medium surface s mucilaginous-fibrous mass with dense colorless film down from that spawn grows representing the thick net of branched hyphas under condition of liquid nutrient medium or as the dense substrate and felted air mycelium in agarized nutrient medium. As the nutrient medium method involves using mineral salts, sugars, amino acids, organic acids, fungal, vegetable or animal biologically active substances in different but less 1% concentrat
