Grain Spawn Making

Low-tech grain spawn made the right way!

68:56 mins.

9:86 mins.

13 Quizzes 


Spawn Quality

You’ll need to know some theory to minimize competitor infection of the future spawn substrate.

You will learn who the common competitors are, how they propagate and what to do to prevent their presence in your substrate. You will see some of the commonest mistakes made by those who want to make spawn and what good habits you should implement in your techniques. 

The process

This part will teach you how to hydrate the grain  and how to perform a moisture test to ensure proper moisture content. It continues with heat treatment, how to work with the flowhood to inoculate the freshly prepared grain and how to incubate that .

This is a settled method on how to make spawn and it doesn’t require modifications.

Spawn Storage

This teaches you how to properly store your mushroom spawn. Spawn storage time depends with fungus species and strain and each have particular storage periods that you have to know so you can ensure freshness.

Sawdust Spawn Making

Explains you the difference between grain spawn and sawdust spawn and teaches you how sawdust spawn it’s made.

Take a Closer Look

The method on how to get mushroom grain spawn is pretty much the same and has many variations. Below you may see the standard method. We start with grain which is first hydrated with water, then it’s heat-treated, cooled, and inoculated with fungus, then incubated -that’s all.

The biggest challenge is to offer this food to one organism -which is the desired fungus (oyster, shiitake, button, etc) -this is done with proper equipment only. Avoiding competitor organisms to take this food away it’s not easy, but hey..this is why I created this guide for you to find the light.


  • Over 70% of the specialty mushroom farms out there are making their own spawn. The good news is that anyone can do it! even a 10 year old. All you need is professional guidance and you'll be successful in making your own mushroom spawn.
  • When growing mushrooms you'll afford to use as much spawn as you want in your mushroom substrate recipes and this always gives you with 10-20% more mushrooms (depending on the amount used) and therefore more profit. When you purchase your spawn you can't use as much as you want/block because it costs you.
  • When you make your own spawn you become independent from the market price/lb of spawn set by random companies. Price per bag of 10 lbs of spawn ranges from $10 to $40 or more. It's expensive and it's not stable either -it's something that you cannot control unless you make your own. This freedom is essential if you're in business otherwise you might be pushed to increase your product's price;
  • You'll be able to CUT COSTS. Shipping spawn to a destination costs in some cases even more than the spawn itself. For a 10 lb bag that costs $35 when you add the shipping cost around $40 you get to $75 or more. When you're business gets bigger you'll feel the difference. Make your own and you'll spend $2 or less/a 10 lb spawn bag;
  • Most spawn companies out there have limited strain availability as spawn (ready to ship). If what they have doesn't match your location you might get low yields or no mushroom fruitbodies. By making your own your free to play around and test different strains and pick the best ones you like;
  • You can sell spawn to people wanting to grow mushrooms.



Materials & recipe

Picking the right container

About inoculum



Heat treatment




About spawn storage

Spawn storage time


Sawdust spawn making


Good spawn vs bad spawn

Competitor organisms

Good habits, bad habits



7 days

(to respond your questions)


Many thanks to student Stanford Muyila for providing this course review. 


If you have any questions here you’ll get some answers


Take a look on what the next class has to offer you


Make sure to check terms and conditions before you purchase this

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