Sterilized Millet Grain Spawn Bags
Sterilized Millet Grain Spawn Bags
5 in stock
Pre-Order Benefits
- Pre-orders ship first, before everyone else
- Change your mind? Cancel for free anytime before it ships
- Ships out 26th November, and we'll send your tracking as soon as it's on its way
- Pre-Sale price: Up to 20% off while it lasts
- Order 2+ bags and we'll add a small gift
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- Perfect for beginners
- Always made fresh to order
- Fully colonised in ~4 weeks
- Ready to inoculate
- Free replacement policy
What Is a Sterilized Grain Spawn Bag?
A sterilised millet grain bag is a ready-to-use bag of hydrated grain that we’ve sterilised in an industrial-grade autoclave. It has a filter patch for fresh air and a self-healing injection port, so you can add your liquid culture. The mycelium then colonises the grain, usually within a few weeks. The result is grain spawn, which you can mix into a substrate. Our spawn bag is filled with hydrated and sterilized millet grain. From our experience, millet grain works best if you a quick colonisation. We offer 3 sizes: 1 kg, 1.5 kg and 2 kg.
What's Included
- 1x Sterilized Millet Grain Spawn Bag
- 2x 70% Isopropyl Alcohol Wipes
- Gloves
- Step-by-step grow guide
Not Included:
- Liquid Culture or Spores (Genetics)
Need something to inoculate your bag with? Browse our liquid cultures.
Compatible Mushroom Strains
Our grain spawn bags work with most cultivated mushroom species, so you can use them for almost any project:
Coir-loving species: grow well on coco coir substrates, which makes them a good fit for beginners.
Dung-loving species: prefer manure-based substrates and can give big flushes.
Medicinal mushrooms: such as Lion’s Mane and Reishi.
Gourmet mushrooms: such as Oyster, Shiitake and King Oyster.
Need something to inoculate your bag with? Browse our liquid cultures.
Support & Service Included:
- ✓ Free Replacement Policy: If the bag arrives contaminated or damaged, we'll replace the bag at no extra cost. Read more here.
- ✓ Clear Instructions: Step-by-step tutorials cover every stage of the growing process, so nothing gets left out.
- ✓ Quick & Professional Help: If you have more questions regarding the grow bag or during the growth, we'll always stand by you. You contact us using Discord, our live chat, or email.
- ✓ Affordable & Discreet Delivery: We ship in an unbranded, plain cardboard box to you. The shipping is 9.99€ EU wide with free shipping over 99€.
Community
Through our Discord server with 1.000+ members, we're very close to the community, which helps us identify pain points and keep improving our products.
Have a question about your grow? Connect with experienced cultivators, share your progress, and get help whenever you need it. Join our Discord.
Frequently Asked Questions
How long until the bag is fully colonised?
How long until the bag is fully colonised?
About 4 weeks for most bags, and it depends on the species, the temperature and how much liquid culture you used. Bigger bags take slightly longer. A bag is ready when the grain is covered in white mycelium.
How much liquid culture or spores do I inject?
How much liquid culture or spores do I inject?
Inoculate the grain directly through the injection port with a spore syringe or liquid culture. Use 2-3 ml for the small bag (1 kg), 3-4 ml for the medium bag (1.5 kg) and 5-6 ml for the large bag (2 kg).
We recommend liquid culture, because spore syringes are much more likely to bring in contamination.
How long can I store an unused bag?
How long can I store an unused bag?
For best results, use your bag within 4 weeks of arrival. After that it usually still works, but not as well, because the grain slowly dries out and that slows down mycelium growth. Keep it somewhere cool and dark until you’re ready to inoculate.
How do I know if it’s contamination?
How do I know if it’s contamination?
Healthy mycelium is white and fluffy, or sometimes slightly thin and stringy. Green, blue, black, pink or yellow patches, slimy grain or a sour smell mean contamination. If you see any of these, don’t open the bag.
My bag has stalled, what now?
My bag has stalled, what now?
Check the temperature first. Mycelium grows very slowly below 19°C, so move the bag somewhere warmer. If the temperature is fine and the mycelium has stopped growing, break and shake the bag. Healthy mycelium will start growing again within a few days. If it doesn’t, or you see coloured patches or notice a sour smell, the bag is probably contaminated.
How to Use a Sterilised Grain Bag
1. Inoculation
2. Colonisation
3. Break & Shake
4. Fully Colonised
5. Spawn to Bulk
More About the Grow Bags We Use
The bag is the most important part of your grow because it’s the foundation for everything that follows. Cheap bags can leak, let in contamination or even rip just when you’re almost ready to harvest. We don’t want that for you. That’s why we use high-quality bags:
- ✓0.08mm thick, robust and puncture-resistant, won't tear during handling or shipping
- ✓0.2 µm filter patch, allows air exchange for the mycelium to breathe, without letting contamination enter
- ✓Silicone rubber injection port, heat resistant with self-healing ability for contamination-free inoculation
- ✓100% polypropylene material, heat and pressure resistant, won't melt or break during sterilisation
- ✓Heat resistant up to 121°C, withstands pressure sterilisation at 15 PSI without warping, melting or leaking
How We Ensure the Quality of Our Bags
We want every bag to arrive in the best quality we can provide, so you can start your grow with confidence. That is why we take extra care at every step, from sterilisation and sealing to testing each batch before it ships.
- ✓Made fresh to order: Your bag is prepared shortly before it ships, so it arrives fresh and ready to grow. We produce our bags once a week, every Monday. Orders placed by Sunday are made on Monday and shipped within 1-2 days. This way you always receive the best quality.
- ✓Sterilised for 3 hours at 15 PSI: Every bag is processed in an industrial autoclave to kill contamination like mold spores and bacteria. We decided to run a full 3-hour cycle just to make sure.
- ✓Batch tested by inoculation: One bag from every batch is inoculated as a test to make sure the batch is clean before we ship it out.
- ✓Sealed in front of a laminar flow hood: We seal our bags in a clean-air environment to keep contaminants out.
- ✓Double-welded seams: Each bag is sealed with an 8 mm double-sided weld for a strong, durable seam that holds up during shipping and the grow process.
More About the Millet Grain We Use
Using the right grain is just as important as everything else. Not only do different grains offer different benefits for growing mushrooms, but each type also needs its own hydration process because of its structure, starch content and more.
- ✓Millet grain, best for fast colonisation
- ✓Natural, food-grade grain, chemical-free with a low natural spore load
- ✓Properly hydrated for 24 hours, ensuring optimal moisture level
- ✓Added gypsum, preventing grain clumping for better airflow