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Description

About Our Sterilized Rye Grain Spawn Bag – 1lb (No Injection Port)

Out-Grow's Sterilized Rye Grain Spawn Bag is a professional-grade substrate prepared for experienced cultivators who prefer grain-to-grain transfers or agar wedge inoculation. This 1lb bag of select-grade rye berries is fully hydrated and pressure sterilized to eliminate contaminants and ensure optimal conditions for rapid colonization.

Prepared in a Professional Mycology Laboratory

Every rye grain spawn bag is produced in our commercial-grade facility, where we’ve specialized in mushroom substrate preparation for over 15 years. The grain is sterilized at 15 PSI for three hours and sealed in a high-quality gusseted grow bag equipped with a 5-micron filter patch. This allows for efficient gas exchange while maintaining a clean, sterile environment for your mycelium to thrive.

Ideal for Experienced Cultivators and Grain Transfers

This version does not include a self-healing injection port, making it best suited for cultivators using sterile technique for grain-to-grain transfers or direct inoculation with agar wedges. This option provides a cost-effective solution without compromising on quality, giving experienced growers more flexibility and control over their process.

Consistent Quality, Backed by Decades of Experience

Out-Grow has supplied sterilized grain substrates to growers across the country since 2010. Our rye berry spawn bags are trusted in both home and commercial environments for their reliability, consistency, and performance. Whether you're expanding a master culture or scaling up production, this substrate provides a clean, nutrient-rich foundation for strong mycelium growth.

Order today and experience the professional quality that has made Out-Grow a trusted name in mushroom cultivation for over a decade.

Customer Reviews

Based on 21 reviews
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S
Stephen
Best products on the market

I have been purchasing from them for years and they have the best products and a great price.

P
Padent
Great service

One of my bags had been slit. My money was promptly refunded. I like the quality of these bags. I have placed 3 orders so far. Will be a repeat customer as it makes it easy for me to get underway. Love this company.

T
Timothy Rex

Great product. The grains always contain the right amount of water content and never have
any popped kernels. Always sterilized to perfection. And Mike's customer service and shipping speed is impeccable.
If you go anywhere else for your mycology needs you are just foolish.

A
Austin Kerr

I cannot recommend out-grow enough. My experience with them has been amazing. I ordered 4 of these bags, and somehow they got contaminated. I sent them and email and they quickly replied and sent me 4 new bags at no cost at all. Best constumer service ever and their products are superb. If I could give them 10 stars I would. Thanks guys you have a customer for life!!

B
Brian Johnson

This is like the 6th time ordering from mike, NEVER had a problem i got both of my bags yesterday 1 day after ordering! NEVER had contamination or any. Always shop out grow!