PF Tek is a method of mushroom cultivation pioneered by Robert McPherson, aka Psylocybe Fanaticus. This technique (tek) utilizes brown rice flour and vermiculite, sterilized in half pint wide mouthed canning jars by boiling or pressure cooking, with a layer of dry vermiculite as a filter agent to keep out competing bacteria and fungus. The sterilized "PF jar" is then injected with solution containing spores and water from a syringe, creating a one step procedure for reliably growing mushrooms indoors.
Psylocybe Fanaticus was the business name of Robert McPherson, the creator of the PF Tek. The PF TEK is an easy, simple, inexpensive and reliable mushroom growing technique, which can be used to grow a wide variety of mushrooms including the edible species Shaggy Mane, Lion's Mane, the bioluminescent species Panellus stipticus, and various species of Psilocybin mushrooms.