Mushroom Grain Spawn

Fungi Perfecti's Grain Spawn comes in two forms and each Grain Master can be expanded to up to 1000 times its mass.

Fungi Perfecti's Grain Spawn comes in two forms and each Grain Master can be expanded to up to 1000 times its mass.

Learn more about Mushroom Grain Spawn +

Fungi Perfecti's Grain Spawn comes in two forms.
Fungi Perfecti's Grain Spawn comes in two forms. The first is a first- or second-generation Grain Master in a reusable 1-gallon glass jar fitted with an autoclavable lid and Synthetic Filter Disc (approximate yield per jar: 2/3 gallon). The second is a first- or second-generation Grain Master in a disposable Spawn Bag with Filter Patch (approximate yield per bag: 1.25–1.5 gallon). Each Grain Master can be expanded to up to 1000 times its mass.

Please note: unlike our ready-to-grow Mushroom Patches and Plug Spawn, our Grain Spawn does not come with instructions. It is up to the purchaser to familiarize him/herself with the techniques of sterile mushroom tissue culture to properly use these products. The books Growing Gourmet & Medicinal Mushrooms and The Mushroom Cultivator are essential texts in this field.
Terms of Use of Fungi Perfecti's Grain Spawn
When you place an order for Fungi Perfecti's Pure Mushroom Grain Spawn, you will be required to read and acknowledge a Sale Agreement prior to delivery. The text for this agreement is available for viewing online:

An Important Note for our Customers in the Hawaiian Islands

The Hawaii State Department of Agriculture has recently increased their restrictions on the importation of live mushroom mycelium into the islands. This affects the sale of Fungi Perfecti's Indoor and Outdoor Mushroom Patches, Plug Spawn for Log and Stump Cultivation, and Pure Mushroom Spawn and Cultures. Customers in Hawaii wishing to purchase any of these products will need to first apply for and receive an Import Permit from the HSDA Plant Quarantine Branch. Additionally, importation of our MycoGrow™ products is completely prohibited.

The permit can be downloaded in Adobe Acrobat format online here. If you have further questions, you can contact Fungi Perfecti or speak directly to Will Leon-Guerrero at the Hawaii State Department of Agriculture, 1428 S. King Street, Honolulu, HI 96814. Phone: (808) 832-0566.

Blue Oyster Grain Master Bag

Blue Oyster Grain Master Bag

$69.00

Latin Name: Pleurotus ostreatus var. columbinusFruiting Temperature: 45–65 °F A cool-weather variant of P. ostreatus, the Blue Oyster is similar in...

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$69.00
Lion's Mane Grain Master Jar

Lion's Mane Grain Master Jar

$69.00

Latin Name: Hericium erinaceusFruiting Temperature: 60–80 °F Lion’s Mane grows on hardwoods, producing delicious fruit bodies with cascading icicle...

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$69.00
True Morel Grain Master Bag

True Morel Grain Master Bag

$69.00

Latin Name: Morchella esculentaFruiting Temperature: 40–50 °F The Yellow or True Morel is one of the most sought-after edible mushrooms. It fruits ...

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$69.00
Shiitake Grain Master Jar

Shiitake Grain Master Jar

$69.00

FP's ready-to-inoculate, pure mushroom Grain Master Jar is a first- or second-generation Grain Master in a reusable 1-gallon glass jar fitted with ...

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$69.00
Lion's Mane Grain Master Bag

Lion's Mane Grain Master Bag

$69.00

Latin Name: Hericium erinaceusFruiting Temperature: 60–80 °F Lion’s Mane grows on hardwoods, producing delicious fruit bodies with cascading icicle...

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$69.00
Pearl Oyster Grain Master Bag

Pearl Oyster Grain Master Bag

$69.00

Latin Name: Pleurotus ostreatusFruiting Temperature: 50–60 °F A longtime favorite of mushroom hunters, fruiting nearly year-round in lowland hardwo...

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$69.00
Pink Oyster Grain Master Jar

Pink Oyster Grain Master Jar

$69.00

Latin Name: Pleurotus djamorFruiting Temperature: 65–85 °F A tropical species, the Pink Oyster mushroom is also known as the Flamingo Oyster. It pr...

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$69.00
Pearl Oyster Grain Master Jar

Pearl Oyster Grain Master Jar

$69.00

Latin Name: Pleurotus ostreatusFruiting Temperature: 50–60 °F A longtime favorite of mushroom hunters, fruiting nearly year-round in lowland hardwo...

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$69.00
Shiitake Grain Master Bag

Shiitake Grain Master Bag

$69.00

FP's ready-to-inoculate, pure mushroom Grain Spawn is offered in a disposable Spawn Bag with Filter Patch (approximate yield 1¼–1½ gallon). Each un...

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$69.00
Reishi Grain Master Bag

Reishi Grain Master Bag

$69.00

Latin Name: Ganoderma lucidumFruiting Temperature: 70–80 °F Known as the Mushroom of Immortality, this Reishi fruits on a wide variety of hardwoods...

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$69.00
True Morel Grain Master Jar

True Morel Grain Master Jar

$69.00

Latin Name: Morchella esculentaFruiting Temperature: 40–50 °F The Yellow or True Morel is one of the most sought-after edible mushrooms. It fruits ...

View full details
$69.00
Reishi Grain Master Jar

Reishi Grain Master Jar

$69.00

Latin Name: Ganoderma lucidumFruiting Temperature: 70–80 °F Known as the Mushroom of Immortality, this Reishi fruits on a wide variety of hardwoods...

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$69.00
Blue Oyster Grain Master Jar

Blue Oyster Grain Master Jar

$69.00

Latin Name: Pleurotus ostreatus var. columbinusFruiting Temperature: 45–65 °F A cool-weather variant of P. ostreatus, the Blue Oyster is similar in...

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$69.00
Black Morel Grain Master Jar

Black Morel Grain Master Jar

$69.00

Latin Name: Morchella angusticepsFruiting Temperature: 40–50 °F The Black Morel is widely distributed across North America, where it fruits in asso...

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$69.00
Black Morel Grain Master Bag

Black Morel Grain Master Bag

$69.00

Latin Name: Morchella angusticepsFruiting Temperature: 40–50 °F The Black Morel is widely distributed across North America, where it fruits in asso...

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$69.00
Pioppino Grain Master Bag

Pioppino Grain Master Bag

$69.00

Latin Name: Agrocybe aegeritaFruiting Temperature: 50–60 °F Also known as the Brown Swordbelt, this mushroom grows prolifically on hardwoods. Recom...

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$69.00
Phoenix Oyster Grain Master Bag

Phoenix Oyster Grain Master Bag

$69.00

Latin Name: Pleurotus pulmonariusFruiting Temperature: 65–75 °F Virtually indistinguishable from P. ostreatus, the Phoenix Oyster grows at higher e...

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$69.00
Maitake Grain Master Jar

Maitake Grain Master Jar

$69.00

Latin Name: Grifola frondosaFruiting Temperature: 50–60 °F Maitake is a delicious, soft-fleshed polypore that grows in northern, temperate deciduou...

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$69.00