The PF-Tek is one of the most beginner-friendly methods for cultivating mushrooms at home. It uses a simple substrate mixture of brown rice flour, vermiculite, and water in a consistent 2:1:1 ratio by volume.
This calculator takes the guesswork out of preparing your jars by helping you scale the recipe based on the number and size of jars you’re using.
PF-Tek BRF Jar Calculator (2:1:1 Volume Ratio)
Recommended PF-Tek Supplies
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Pressure Cooker
For the best results with PF-tek, it is recommended to use a pressure cooker. Below is the best budget pressure cooker that will do the job.
→ Check pressure cookers on Amazon
Wide-Mouth Jars
Wide-mouth preserving jars make colonised PF cakes much easier to remove. Get the ones I have listed below
→ Check wide-mouth jars on Amazon
Vermiculite
One of the three core ingredients used in the standard PF-Tek BRF mixture.
→ Check vermiculite on Amazon
Brown Rice Flour
Brown rice flour is the core nutrients that the mycelium consumes.
→ Check vermiculite on Amazon
Fruiting Setup
Checkout this ready-made fruiting setup below
→ Check fruiting setup on Amazon
To create the mix you need to weight out the vermiculite first, then mix in the water and finally mix in the brown rice flour. Read my full guide on growing mushrooms with PF-tek here.