Welcome to our new website!

New products and offerings!

Thank you for your business!

Free shipping on orders over $100 inside the continental US

Bulk discounts are calculated at the final checkout screen
Liquid Fungi  |  SKU: 310003802212

Portobello Mushroom Grain Spawn (1 pound)

$20.00
Shipping calculated at checkout.

Portobello Mushroom Identification

Classification: Agaricus bisporus

Other Names: Portobella, Portebella, Portebello

Portobello Mushroom Substrates

Sterilized Compost/Manure Substrate

Sterilized Mix of Compost/Manure (20%), Sawdust, Sand, Leaf Litter

Petri: Malt Extract Agar, Dextrose Agar

Spawn: Rye Berries, Millet, Oats, Corn

Portobello Mushroom Environmental Information

Moderate Temperature

Incubation Temperature: 75F-85F

Incubation Time: 12-14 Days

Fruiting Temperature: 65F-75F

Fruiting Humidity: 85%-93%

Pinning Time: 4-10 Days

Total Fruiting Time: 12-18 Days

Beginners Favorite

This is an easy species to grow and fruit, ideal for people who are just starting out.

Compost/Manure Mushroom

This mushroom requires a special substrate containing around 20% leached and dried manure or compost.

Agaricus bisporus is an edible basidiomycete mushroom native to Europe and North America. It has two color states while immature – white and brown – both of which have various names, with additional names for the mature state. A. bisporus is cultivated in more than seventy countries, and is one of the most commonly and widely consumed mushrooms in the world. The mushroom grows naturally in grasslands, fields and meadows in North America and Europe.


Our Portobello Mushroom Grain Spawn is grown on 100% certified organic rye berries. It arrives contaminate free, fully developed, and ready to use. Portobello Mushroom Grain Spawn is used to inoculate many bags of bulk substrate quickly. Transferring grain into bulk substrate bags is the choice methodology for medium and large scale growers. Portobello Mushroom Grain transfers are usually performed in a flow-hood or bio-cabinet. Simply break up the Portobello Mushroom Grain Spawn, then transfer grains to each bag you want to inoculate.

Payment & Security

Payment methods

  • American Express
  • Diners Club
  • Discover
  • JCB
  • Mastercard
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Liquid Fungi

Portobello Mushroom Grain Spawn (1 pound)

$20.00

Agaricus bisporus is an edible basidiomycete mushroom native to Europe and North America. It has two color states while immature – white and brown – both of which have various names, with additional names for the mature state. A. bisporus is cultivated in more than seventy countries, and is one of the most commonly and widely consumed mushrooms in the world. The mushroom grows naturally in grasslands, fields and meadows in North America and Europe.

Our Portobello Mushroom Grain Spawn is grown on 100% certified organic rye berries. It arrives contaminate free, fully developed, and ready to use. Portobello Mushroom Grain Spawn is used to inoculate many bags of bulk substrate quickly. Transferring grain into bulk substrate bags is the choice methodology for medium and large scale growers. Portobello Mushroom Grain transfers are usually performed in a flow-hood or bio-cabinet. Simply break up the Portobello Mushroom Grain Spawn, then transfer grains to each bag you want to inoculate.

View product