Description
Black Pearl King Oyster Mushroom (Pleurotus eryngii) Grain Master
For sale is a 1-quart jar of Black Pearl King 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 Black Pearl King culture for its dark cap colour and its heavier fruiting habit compared to a standard King Oyster. It is a distinct selection within Pleurotus eryngii and the most striking of the group on a plate.
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, break, recover, transfer. Handle it exactly as you would a standard King Oyster. Sterilized supplemented sawdust rather than pasteurized straw, and strong fresh air exchange during fruiting.
Black Pearl King Oyster Growing Conditions
Black Pearl colonizes grain in 8 to 14 days at 70 to 80F and fruits at 55 to 60F. The difference from a standard King is visual and it is worth having: caps come in dark grey to near black against the white stem, and the strain tends to throw more fruits per block. It carries the same requirements as any King Oyster, which means a sterilized substrate and real air movement. If you are growing King commercially and want something that photographs differently at market, this is the one.
| Spawn run | 70 to 80F |
|---|---|
| Grain colonization | 8 to 14 days |
| Fruiting temperature | 55 to 60F |
| Substrates | Sterilized supplemented hardwood sawdust, Master's Mix |
| Difficulty | Intermediate |
| Season | Cool season |
| Note | Prefers sterilized over pasteurized substrate |
Storage and Shelf Life
Refrigerate at 35 to 40F. Warm to room temperature for a day before transferring. Do not freeze.
In the Kitchen
Same dense stem as a standard King with a darker cap that holds its colour when cooked. Slice thick and sear hard.
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.
Related Resources
Black Pearl King Oyster Mushroom Spawn, 1 Quart Jar
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Description
Black Pearl King Oyster Mushroom (Pleurotus eryngii) Grain Master
For sale is a 1-quart jar of Black Pearl King 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 Black Pearl King culture for its dark cap colour and its heavier fruiting habit compared to a standard King Oyster. It is a distinct selection within Pleurotus eryngii and the most striking of the group on a plate.
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, break, recover, transfer. Handle it exactly as you would a standard King Oyster. Sterilized supplemented sawdust rather than pasteurized straw, and strong fresh air exchange during fruiting.
Black Pearl King Oyster Growing Conditions
Black Pearl colonizes grain in 8 to 14 days at 70 to 80F and fruits at 55 to 60F. The difference from a standard King is visual and it is worth having: caps come in dark grey to near black against the white stem, and the strain tends to throw more fruits per block. It carries the same requirements as any King Oyster, which means a sterilized substrate and real air movement. If you are growing King commercially and want something that photographs differently at market, this is the one.
| Spawn run | 70 to 80F |
|---|---|
| Grain colonization | 8 to 14 days |
| Fruiting temperature | 55 to 60F |
| Substrates | Sterilized supplemented hardwood sawdust, Master's Mix |
| Difficulty | Intermediate |
| Season | Cool season |
| Note | Prefers sterilized over pasteurized substrate |
Storage and Shelf Life
Refrigerate at 35 to 40F. Warm to room temperature for a day before transferring. Do not freeze.
In the Kitchen
Same dense stem as a standard King with a darker cap that holds its colour when cooked. Slice thick and sear hard.
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.