Description
Pearl Oyster Mushroom (Pleurotus ostreatus) Grain Master
For sale is a 1-quart jar of Pearl 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 Pearl Oyster culture as our reference Pleurotus ostreatus. It is the widest substrate tolerance in the collection and the strain we benchmark every other oyster against.
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
Break the grain up after a day of rest, let it recover, then transfer. Pearl takes to almost anything you put it on, which makes it the safest choice if you are still dialling in your substrate. Expand it into fresh sterile grain, or spawn it directly to bulk.
Pearl Oyster Growing Conditions
Pearl colonizes grain in 10 to 14 days at 70 to 78F and fruits across 55 to 75F, which is the broadest working range of any oyster we carry. It is not fussy about substrate: straw, Master's Mix, supplemented hardwood sawdust, and most agricultural waste will all produce. Caps come in pale grey to tan depending on temperature and light. This is the strain to use when you want predictable results rather than a specific colour or a specific season, and it is the one most commercial growers standardise on for exactly that reason.
| Spawn run | 70 to 78F |
|---|---|
| Grain colonization | 10 to 14 days |
| Fruiting temperature | 55 to 75F |
| Substrates | Master's Mix, pasteurized straw, supplemented hardwood sawdust, agricultural waste |
| Difficulty | Beginner |
| Season | Year round |
Storage and Shelf Life
Holds well refrigerated at 35 to 40F. Return it to room temperature for a day before you transfer. Do not freeze.
In the Kitchen
Tender and mild, best cooked hot and fast. Pearl breaks down faster than Blue in a pan, so keep the heat up and do not crowd the skillet. Excellent in stir fry and in stock.
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
Pearl Oyster Mushroom Spawn, 1 Quart Jar
Description
Pearl Oyster Mushroom (Pleurotus ostreatus) Grain Master
For sale is a 1-quart jar of Pearl 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 Pearl Oyster culture as our reference Pleurotus ostreatus. It is the widest substrate tolerance in the collection and the strain we benchmark every other oyster against.
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
Break the grain up after a day of rest, let it recover, then transfer. Pearl takes to almost anything you put it on, which makes it the safest choice if you are still dialling in your substrate. Expand it into fresh sterile grain, or spawn it directly to bulk.
Pearl Oyster Growing Conditions
Pearl colonizes grain in 10 to 14 days at 70 to 78F and fruits across 55 to 75F, which is the broadest working range of any oyster we carry. It is not fussy about substrate: straw, Master's Mix, supplemented hardwood sawdust, and most agricultural waste will all produce. Caps come in pale grey to tan depending on temperature and light. This is the strain to use when you want predictable results rather than a specific colour or a specific season, and it is the one most commercial growers standardise on for exactly that reason.
| Spawn run | 70 to 78F |
|---|---|
| Grain colonization | 10 to 14 days |
| Fruiting temperature | 55 to 75F |
| Substrates | Master's Mix, pasteurized straw, supplemented hardwood sawdust, agricultural waste |
| Difficulty | Beginner |
| Season | Year round |
Storage and Shelf Life
Holds well refrigerated at 35 to 40F. Return it to room temperature for a day before you transfer. Do not freeze.
In the Kitchen
Tender and mild, best cooked hot and fast. Pearl breaks down faster than Blue in a pan, so keep the heat up and do not crowd the skillet. Excellent in stir fry and in stock.
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.