Mushroom Grain Spawn Colonization: The Complete Step-by-Step Guide | Spores Lab Canada All Spores Lab products are sold for microscopy and taxonomic research. Cultivation laws vary by jurisdiction — verify your local legal framework before proceeding. Mushroom grain spawn colonization is the stage that determines whether everything that follows succeeds or fails. It is also the stage where most beginners make the mistakes that cost them — not because the process is complica