This article is part of the Spores Lab Substrate Preparation pillar — a complete guide to choosing, preparing, and optimising your growing medium for psilocybin and gourmet mushroom cultivation. Start with the full guide at sporeslab.io/post/substrate-preparation-the-foundation-of-every-successful-grow Pasteurization vs sterilization mushrooms. One of the most debated questions in mushroom cultivation , pasteurization vs sterilization mushrooms.— and the answer is more nuance

A close-up overhead shot of a freshly prepared and sterilized supplemented sawdust block inside a clear polypropylene bag A practical guide to what substrate actually does in mushroom cultivation — and why getting it right is the difference between thriving mycelium and a contaminated bag. In mushroom cultivation, substrate is more than just a growing medium — it is the primary food source that determines colonization speed, yield size, flush consistency, and overall succes