What’s Inside the Handbook
Everything we wished had existed when we grew our first contaminated jar of grain spawn.
Choosing Your First Species
A comparison of oyster mushrooms, lion’s mane, shiitake, and king oyster — difficulty, yield, flavour, and grow time, so you can make the right choice first time.
PF Tek: The Beginner’s Method
Step-by-step: preparing grain jars, sterilisation, inoculation, incubation, and the signs that tell you everything is going right — or wrong.
Substrate Recipes
Recipes for straw, coco coir, hardwood fuel pellets, and master’s mix — with pasteurisation and sterilisation instructions for each.
Fruiting Chamber Builds
Illustrated build plans for the Shotgun Fruiting Chamber (SGFC) and Martha Tent setup — including humidity, FAE, and lighting requirements.
Contamination Guide
Visual identification of green, black, and pink mould — what causes each type, when to abort, when to isolate, and how to prevent it happening again.
Equipment & Supplier Guide
Recommended pressure cookers, grow bags, syringes, and substrate suppliers — with specific product names, where to buy, and what to avoid.
Trusted by 12,000+ Growers
“The contamination chapter alone is worth downloading this for. I’d failed three batches and didn’t understand why — this guide diagnosed the exact problem in five minutes.”
“I’ve read every subreddit, watched every YouTube channel. This handbook is clearer and more honest than anything else I’ve found. My first oyster flush worked perfectly.”
“The species comparison table at the front is one of the most useful things I’ve seen. Saved me from making an expensive mistake with a species way above my skill level.”