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The PF Tek ("Psilocybe Fanaticus technique") is a technique or recipe for growing mushrooms using brown rice flour, vermiculite, and half-pint mason jars. The growing method was developed and first made public in 1992 by Robert McPherson aka Psylocybe Fanaticus. It was designed to make the cultivation of mushrooms (specifically Psilocybe cubensis) at home feasible for complete beginners utilizing commonly available materials. The technique is also suitable for many other species.

The Guide[]

For a step by step guide to growing with the PF technique, see PF tek (guide).


Most criticisms of the PF tek compare it to growing methods which use bulk substrates. Some criticisms of the method include lower yields, lower potencies (for active species), and the amount of labor required for each jar.

See Also[]