Mushroom Growing Basics — Complete Beginner's Guide | Spores Lab Canada Every mushroom grow — whether it ends in dense, clean flushes or a bag of green contamination — was determined by decisions made before a single mushroom pin appeared. This guide covers those decisions: what they are, why they matter, and what order they happen in. Mushroom cultivation follows a fixed biological sequence. Understanding that sequence, and what can go wrong at each stage, is the differenc