Premium Grain Spawn- Shipped to you!

Looking for top quality grain spawn shipped right to your door?

You’ve come to the right place!
That’s right, FreshCap now sells premium grain spawn for a number of different species. New to growing mushrooms? Check out our article to learn all about grain spawn.

If you’re looking to grow the most reliable strains of Shiitake, Lions Mane and different varieties of Oyster- without the hassle of managing a culture and working in a lab, then starting from top quality grain spawn is the best way to go.


Our spawn is grown on a perfect blend of millet and white sorghum grain. Mushrooms really do love this stuff!

You want the best? Good. We’ve hand picked select strains that are fast colonizing, high yielding and reliable.

If you have any questions at all regarding our spawn, don’t hesitate to get in touch through our Facebook page, or using our contact form.


Check out some of the strains we offer below. We have chosen a variety of species that can grow well in a number of different situations. We will be adding new species all the time. Not seeing something that you want to grow? Let us know and we’ll see what we can do to help you out!


    B.E. 120-170%
    This species is fast growing and high yielding. Prefers a cool environment and requires a TON of fresh air in order to get big meaty caps and short stems. Good beginner strain! Learn more here, or buy now!

  • pink-oyster-mushroom-grain-spawn

    B.E. 100-170%
    This species grows fast! Prefers warmer weather. Can produce large caps, but still a delicate mushroom. Vibrant pink color is a head turner. Learn more here, or buy now!

  • king-oyster-grain-spawn

    Big meaty caps and small stems is possible with light and fresh air. King Oysters have the best shelf life of all the strains, great for farmers markets! Learn more here, or buy now!

  • lions-mane-grain-spawn

    B.E. 70-100%
    Lions Mane mushrooms grow big meaty snowball like formations. Delicate teeth, needs to be handled carefully, but is a real crowd pleaser! Learn more here, or buy now!

  • shiitake-mushroom-grain-spawn

    B.E. 60-70%
    Best suited to wood substrates. A good yielding and reliable Shiitake strain. An ideal choice for the more experienced grower. Buy now!


Grain spawn is a living breathing organism that needs to be properly cared for in order to achieve the best results.

Here are some tips to get the most success with your spawn.

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    Be Quick!

    Try to use your grain spawn as soon as you get it. The fresher the better. It has likely traveled a long way and is ready to be used!

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    Store Properly

    If you do need to store it, do so in a cool, dry and dark environment. Most species will do well to refrigerate.

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    Use Proven Techniques

    If you are buying grain spawn, you should be reasonably knowledgeable in the techniques used to grow mushrooms from spawn.

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    Stay Clean

    Maintain a clean environment when working with grain spawn. Grain spawn is still susceptible to contamination, even when fully colonized. Proper sterile technique goes a long way!


You should be somewhat familiar with proper growing techniques before you buy your spawn. The most common methods of growing mushrooms using grain spawn are growing on staw, growing on supplemented sawdust or just growing in a garden bed. Check out our article on how to grow mushrooms from spawn , or check out one of these great books and learn from the best!

Growing on Straw

Add your spawn to properly pasteurized straw at a ratio of 5-15%. Mix the spawn in evenly to ensure multiple inoculation points. Pack poly tubing to make a straw log, cutting slits into the side. Hang in grow room for colonization and fruiting. See growing mushrooms on straw.

Growing on Sawdust

Some species grow better on supplemented sawdust, which needs to be fully sterilized. Inoculate fruiting blocks with grain spawn in front of a flow hood or similar sterile environment. See growing gourmet mushrooms on supplemented sawdust fruiting blocks.


We will ship our spawn anywhere in the mainland US or Canada. If you live outside of these areas, please contact us to see if we can make something work.
We try to have all our species on hand at any given time. That being said, sometime we will need some time (up to three weeks) to prepare your order. If that is the case we will let you know! Because spawn is best when used fresh, we try to only ship on Mondays, Tuesdays, and sometimes Wednesdays. The reason for this is so that the spawn can be picked up when it arrives and won’t spend the weekend at the post office.
We guarantee that we will send you good quality spawn- the best we’ve got. If the spawn fails because of an error on our part, then yes- we will either replace or refund. We want you to be happy! That being said, if the spawn fails because it sat in a hot mailbox for three days, or improper techniques were used to grow it, then we will have to deal with that on a case by case basis.
If there is a particular species that you are looking for, that is not listed on the site- let us know, we’ll see what we can do. We have a large collection of cultures, but not all of them are regularly available as spawn.
No problem! We typically sell small bags of spawn for the hobby grower- but if you are starting a farm, or already have an operation, let us know what you are looking for. We can accommodate your spawn needs! The largest bags we sell are 10lbs, but we have a large supply capability.

Any other questions that aren’t answered here? Get in touch through our contact page!