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Sterilized Rye Berries - Grain Spawn


Starting at: $7.95

Please Choose:





Sterilized and prepared mushroom grain spawn substrate (1 lb.) in a gusseted autoclave bag with filter patch and self-healing injection port. Shroom Supply grain spawn is composed of 100% USDA certified organic rye berries which is widely regarded as the highest quality grain for spawn production and is the industry standard for mushroom cultivation. The substrate is free of any additives or chemicals and is recommended for use with our pre-pasteurized mushroom compost.

Once colonized with mushroom mycelium, we recommend using the colonized grain spawn to inoculate a bulk substrate, like our premium pre-pasteurized mushroom compost. We recommend spawning two pounds of our grain spawn to five pounds of our compost. Alternatively, the colonized grain spawn can be transferred to more sterilized grains to promote further propagation of the mushroom mycelium (also known as a grain to grain transfer).

We prepare our organic rye berry grain spawn by thoroughly rinsing the grains, then soaking them for 18 hours in a gypsum-fortified water bath to ensure optimal moisture and mineral levels. Immediately after the soak, the rye is simmered for 10 minutes in distilled water. The rye berries are then sterilized at 15 PSI in a lab-grade autoclave for a complete 120 minutes.

Our grain spawn comes heat-sealed in a sterile, filter-patch mycobag with injection port and can be stored at room temperature for up to 14 days before use. If longer than 14 days is needed, the grain can be stored in a clean container in the refrigerator for up to six weeks. Do not freeze.

All sterilized grain spawn will come packaged in individual 1 lb. bags, regardless of quantity ordered.

Made to order, usually ships within 2 business days.


Instructions: How to inoculate sterilized grain bags

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08/17/2016
R Dubya
5 of 5 Stars
FAST shipping. Easy to use. I've gone through 5 bags so far with no contams. Great buy, for sure.
06/29/2016
Matthew
5 of 5 Stars
Received within 2 BD of ordering; bought 12 lbs. Immediately used 10 bags to inject with LC and they are rocking; used 2 more a few days later for grain to grain and that was the fastest colonization I've ever seen (Old World Blue Oyster, about 5 days). Thanks for a great product!
03/30/2016
BRANDON
5 of 5 Stars
Wow super fast service and very friendly the bags are packaged nicely and very well made I don't forsee any issues and I will definitely be ordering again!
09/24/2015
Frank Hernandez
5 of 5 Stars
I had previously tried similar sized / featured rye spawn bags from 4 other vendors -- no need to mention their names because if you are reading this, you have found the diamond in the ruff! These bags not only arrived the fastest, but they also have THE BEST QUALITY and craftsmanship put into them. Between the fast shipping, quality and well-assembled bags, speedy colonization rates... this is the only place I will ever buy my spawn from. If skeptical, YOU WILL NOT BE DISAPPOINTED. I only rate 5 stars because I cannot rate more! lol. The best bags out BY FAR! Look no further.
07/23/2015
Jeff Keith
5 of 5 Stars
Not only a great product but these people have hyper speed shipping ! Don't waste time and money with other companies, The Shroom Supply is the best !
06/18/2015
Justin
5 of 5 Stars
You will not regret it! Just be sure to loosen up the bag (read directions on the page) working on my next order now :D

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