Grain Spawn

Grain spawn is fully-colonized grain — the living bridge between a liquid culture and a finished crop. Our mushroom grain spawn is colonized in an ISO 7 cleanroom and contamination-screened before release, so it’s ready to break up and mix straight into your bulk substrate for fast, even colonization.

We keep a rotating selection of gourmet species in stock, alongside limited weekend releases of exotic and hard-to-find strains — small batches that move quickly. Want to start a step earlier? Browse our liquid culture syringes, or read How to Use a Liquid Culture to see where grain spawn fits in the process.