Description

Blue Oyster Mushroom (Pleurotus ostreatus var. columbinus) Grain Master

For sale is a 1-quart jar of Blue Oyster Mushroom Spawn. This is a generation 1 grain master mushroom spawn jar used for expansion of isolate mycelium, optimized for spawn run times and bio efficiency.

Out Grow has isolated this Blue Oyster culture for its aggressive rhizomorphic growth, its uniform colonization across the jar, and the dense blue-grey clusters it throws when fruited cool. It is the culture we reach for first when we need spawn to move fast.

What a G1 Grain Master Is

A grain master is a jar of fully colonized grain made to be transferred, not consumed. Generation 1 means the mycelium in this jar came directly from one of our agar plates rather than from another bag of grain, so it sits one step from the culture library instead of three or four. That matters because every transfer is another opportunity for contamination to ride along, and because a G1 jar still has the full expansion runway ahead of it. One quart can seed several more quarts of sterile grain, and those can seed your bulk substrate.

How to Use This Jar

Rest the jar at room temperature for a day, then break the grain apart and let it recover before you transfer. From there it goes into fresh sterile grain for expansion, or straight into a sterilized or pasteurized bulk substrate. Blue Oyster is forgiving enough that it will out-run minor problems that would stall a slower species.

Blue Oyster Growing Conditions

Blue Oyster colonizes grain in 10 to 14 days at 72 to 78F and generates real heat doing it, so keep your spawn run under 80F for the strongest growth. It fruits from 55 to 75F, and the deep blue grey colour it is named for develops best at 60 to 65F. It runs well on Master's Mix, pasteurized straw and supplemented hardwood sawdust, and it is the most dependable indoor oyster we carry from autumn through spring. For a warm room or a summer grow, Phoenix and Pink are the better fit.

Storage and Shelf Life

Refrigerate at 35 to 40F if you cannot use it right away. Blue Oyster tolerates cold storage well, unlike Pink Oyster which must never be refrigerated. Bring it back to room temperature for a day before transferring, and never freeze it.

In the Kitchen

Blue Oyster has more body than Pearl and holds its texture in a hot pan instead of collapsing. Dry sear it first to drive off water, then add fat. Pick the cluster before the caps flatten and the edges begin to wave.

Guarantee and Live Shipping

Every jar is inspected before it leaves our lab and guaranteed to arrive alive and contamination free. If it does not, photograph the jar sealed and unopened and contact us within 48 hours of delivery for a replacement or refund. Live spawn is temperature sensitive, so we hold shipments during extreme heat and cold rather than sending something that will not survive the trip.

Browse the rest of the mushroom spawn collection.