From cow dung to coffee grounds. this species grows well on a variety of substrates.
Cultivating P. cubensis: Light and Tryptamine Are Key for Controlling Psilocybin and Psilocin Levels
No light and increasing tryptamine in the growing medium leads to more psilocin but less psilocybin in the mushrooms.
Many factors are at play in creating the mysterious cocktail of psychoactive chemicals found in magic mushrooms.