Blue Oyster Rye Grain Spawn

Know what you are growing

Made for the right stage.

Blue Oyster spawn contains living Pleurotus ostreatus mycelium on hydrated rye grain. This is a named species product, not a bag of untreated grain or a generic culture. Its role is to start mycelium in a larger receiving substrate.

Use this spawn with appropriately prepared wheat straw or hardwood substrate, following a species-appropriate inoculation rate and clean handling method. The receiving substrate still needs appropriate preparation; spawn does not replace that work.

Plan to use living spawn promptly. Final storage guidance and shelf life must come from the strain supplier; do not infer viability or purity from appearance alone.