The classic beginner-friendly tek using brown rice flour and vermiculite in half-pint jars.
Beginner · 4-6 weeks to harvest
PF Tek (Psilocybe Fanaticus Technique) is the most popular beginner method. It uses cheap, accessible materials and is forgiving of small mistakes. You'll grow mushrooms directly on small cakes made from brown rice flour and vermiculite.
You'll need: half-pint wide-mouth mason jars (12 pack recommended), brown rice flour (BRF), vermiculite (fine or medium grade), water, a pressure cooker, spore syringe, still air box, micropore tape, and a fruiting chamber (shotgun fruiting chamber or plastic tub with perlite). Total cost is typically $50-75 for your first grow.
Mix 2 parts vermiculite, 1 part brown rice flour, and 1 part water by volume. The mix should hold together when squeezed but not drip—this is called 'field capacity.' Fill jars to 1/2 inch below the rim, then top with a layer of dry vermiculite (this is your contamination barrier—don't skip it). Punch 4 holes in the lid with a nail.
Cover jars with foil (shiny side down) and pressure cook at 15 PSI for 60–90 minutes. Let cool completely—overnight is safest. Never inoculate warm jars; condensation leads to contamination. The jars are ready when they're room temperature and no moisture is visible inside.
Work in a still air box wiped down with isopropyl alcohol. Flame-sterilize your needle until red-hot, let it cool for 10-15 seconds. Inject ~0.5-1cc of spore solution through each of the 4 holes (covered with micropore tape). Tilt the jar so solution runs down the glass—this lets you see colonization progress. Seal holes with fresh micropore tape.
Store jars in a dark, warm place (75–80°F). Mycelium will appear as white growth within 1–2 weeks. Full colonization takes 3–5 weeks. Don't open or shake the jars. Watch for green, black, or orange contamination—discard any contaminated jars immediately. Wait 1 week after full colonization before birthing to let the cake consolidate.
Remove the cake from the jar by tapping gently or using a clean fork to pry it out. Rinse gently under cool water to remove loose vermiculite. Submerge in clean water for 12–24 hours (this rehydrates the cake for fruiting). After dunking, roll the cake in dry vermiculite for a moisture-retaining casing layer.
Place cakes in a fruiting chamber on foil squares or jar lids (not directly on perlite). Mist the chamber walls (not the cakes directly) 2-3 times daily. Fan for 30 seconds after misting to provide fresh air exchange. Maintain 85-95% humidity and 70-75°F temperature. Pins should appear within 1–2 weeks.
Harvest when veils begin to tear by twisting gently at the base. Don't wait until caps fully open—potency decreases and spores make a mess. After harvest, soak the cake again for 12-24 hours and return to fruiting for another flush. Most cakes produce 2–4 flushes with decreasing yields.
Growing psilocybin-containing mushrooms is illegal in many countries and in most of the United States. Laws vary by state and locality. This content is for educational purposes only. Check your local and national laws before acquiring spores, equipment, or attempting to cultivate any controlled species. We do not encourage or assist in any illegal activity.
Everything you need to start: equipment, sterilization basics, and your first grow from start to harvest.
Larger-scale cultivation in plastic tubs with bulk substrate for higher yields. More setup, more harvest.
Understanding spore syringes, spore prints, and how to inoculate grain or substrate safely and cleanly.