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Blank Grain Spawn Bag

Blank Grain Spawn Bag

Regular price £16.95 GBP
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Our Blank Grain Spawn is the perfect foundation for big, bountiful yields. This proprietary millet and milo blend is optimised for rapid colonisation, providing a strong start for your mycelium while minimising the risk of contamination. Once inoculated, simply pair it with our Bulk Substrate – CVG Mix or other substrate to achieve robust growth and impressive yields, making it ideal for both beginners and experienced growers. 

🍄 Perfectly hydrated millet and milo blend for spawn production 

🌱 Ideal for spawning to bulk with a substrate 

💉 Ready to inoculate with your spore or liquid culture of choice  

🧪 Pre-sterilised under cleanroom lab conditions  

🛡️ Guaranteed to produce mushrooms or we’ll replace your spawn free of charge 

NOT INCLUDED: Spore or liquid culture syringe – liquid cultures for gourmet varieties are available here.   

Want to learn how to grow mushrooms with this kit? See our online guide here

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Description

THE PERFECT STERILISED GRAIN BLEND FOR SPAWN PRODUCTION 

Our best-selling, optimally hydrated millet and milo grain is one of the best options for spawn production. It is superior to many other grains like rye as it colonises more rapidly and resists contamination; mycelium just loves it! 

Our grain spawn is highly versatile and can be used with a variety of different mushroom species, from exotic, functional, or gourmet fungi 

THE BENEFITS 

  • Perfect foundation for starting your mushroom cultivation 

  • Supports rapid colonisation for fast, healthy mycelium growth 

  • Guaranteed to produce mushrooms or we’ll replace your spawn free of charge 

  • Save money by growing your own mushrooms at home 

  • Little space required to grow & is discreet with no smells 

  • Grow fresh, delicious mushrooms you can't find in the shops  

HOW TO USE 

The process is simple:  

1. Inoculation: Simply inoculate with 5ml of gourmet culture or spore solution via the injection port and leave to colonise.  

2. Colonisation: Within 3 to 4 weeks, the grain will have fully colonised the substrate and be ready to spawn to bulk.  

3. Spawning: Once your grain spawn is fully colonised, simply mix it with our Bulk Substrate – CVG Mix in a MonoTub, perfect for growing exotic fungi or dung loving fungi. Alternatively, if you’re growing gourmet mushrooms, you can mix it with our Bulk Substrate – Hardwood Mix to create a high-yielding fruiting block. For therapeutic fungi we recommend a 2:1 bulk substrate to spawn ratio, but if you’re growing gourmet mushrooms we recommend a 6:1 wood-based substrate to spawn ratio. 

Gone are the days of having to trawl through decade-old forum posts to figure out the fascinating but often confusing science that is growing mushrooms. Our step-by-step, easy-to-follow guide ensures a successful harvest, eliminating guesswork and making the whole process a breeze. 

INGREDIENTS  

Great mushrooms begin with great spawn. That is why we only use 100% natural and organic grain in our spawn. We only use the high-quality, natural ingredients for our products, specifically selected to support the optimal growth of mushrooms. 

Our optimally hydrated millet and milo blend is the best grain spawn available. It’s ideal for spawn production because it colonises quickly and resists contamination better than many other grains, including Rye. We first soak and then cook our grain, carefully hydrating it to around 50% water content before sterilising the bags in a computer-controlled steam autoclave for 2 hours at 121°C. 

WHATS INCLUDED 

  • 1kg or 1.5kg (depending on selection) premium millet grain, packaged and sterilised in industry leading Unicorn grow bags with injection port  

  • Sterile swab 

WE DO NOT INCLUDE 

Spore or liquid culture syringe: Liquid cultures for gourmet varieties are availablehere. 

Physical copy of the growing guide: You can find our online step-by-step mushroom growing guidehere, as well as some of our own tips and tricks for optimising your grow. We highly recommend reading it before purchasing! 

STORAGE 

Please aim to use your Grain Spawn soon after receiving it. If you are not using right away, store the bag in the fridge. Stored this way, your spawn should last at least 3 months. 

  • EASY TO USE

  • MASSIVE YIELDS

  • SET & FORGET

  • SAVE MONEY

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What people are saying

  • INJECT BAG

  • WAIT 4-6 WEEKS

  • HARVEST MUSHROOMS

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MARTIAN MUSHROOMS

  • Can grow multiple mushrooms
  • QC lab tested for contaminants
  • Easy to use with help from our mycologists
  • Lifetime guarantee protected
  • Monster yield MS-4 substrate blend
  • Turbo colonisation times
  • AutoGrow Tek set & forget growing
  • Fun step by step guided process

GENERIC GROW KITS

  • Only grows a few species
  • Untested for contamination
  • Difficult to use without any on hand help
  • Not protected if something goes wrong
  • Lower yielding substrate
  • Slow colonising weak genetics
  • Lots of steps to get mushrooms
  • Frustrating to use with long process

FAQ

DOES THIS COME WITH SPORES OR CULTURE SYRINGE?

There is NO spore or culture syringe included with the Blank Grain Spawn Bag. It is non-inoculated to allow you to inject the species of your choice. Liquid cultures for gourmet varieties are available here.

HOW MANY SYRINGES DO I NEED?

You only need 5ml of spore or liquid culture solution per bag, so one syringe can inoculate 2 bags. We don’t recommend using more than 5ml per bag, because too much liquid can throw off the moisture content within the bag. 

You can store any unused solution in the fridge for future use. Stored that way, they’ll keep for many months. 

HOW IS THIS GRAIN BAG USED?

Fortunately, it’s really easy to use, you just need to follow our guides by clicking here.

HOW DO I STORE THIS GROW KIT?

Ideally do not store your grow kit and inoculate right away, if you are not using right away keep your kit in the fridge.

WHAT MUSHROOMS CAN BE GROWN WITH THIS KIT?

Our Martian Mushrooms kits are designed with versatility in mind and can support the growth of various edible and ornamental mushroom species. Some popular types of mushrooms that can be grown with our kits include Oyster mushrooms, Shiitake mushrooms, Lion’s Mane, Reishi, Chaga, Turkey Tail and many others that are legal and safe for cultivation at home.

It’s important to note that while our kits can technically support the growth of various types of mushrooms, we strongly advise against and do not condone the use of our kits for the cultivation of mushrooms that are illegal to grow in your country. This is due to the legal restrictions in many regions, including the UK where we are based, it is illegal to cultivate certain species of mushrooms.

At Martian Mushrooms, we are committed to promoting responsible and legal use of our products. We reserve the right to refuse service to anyone suspected of intending to use our products for illegal purposes. Always check and comply with your local laws and regulations regarding the cultivation and possession of mushrooms. Any customer service requests regarding the cultivation of illegal species will be ignored. 

CAN I GROW MULTIPLE TYPES OF MUSHROOMS WITH THE SAME KIT?

We dont recommend growing more than one type of mushroom per kit. Growing multiple types of mushrooms may result in poor flushes.

WHERE DOES THIS PRODUCT SHIP TO?

Please refer to our delivery details 

HOW LONG DOES IT TAKE TO GROW?

It will depend on a few different factors, mainly temperature. But it will range from about 4-8 weeks. 

FAQ

There is NO spore or culture syringe included with the Blank Grain Spawn Bag. It is non-inoculated to allow you to inject the species of your choice. Liquid cultures for gourmet varieties are available here.

You only need 5ml of spore or liquid culture solution per bag, so a 10ml syringe can inoculate 2 bags. We don’t recommend using more than 5ml per bag, because too much liquid can throw off the moisture content within the bag. 

You can store any unused solution in the fridge for future use. Stored that way, they’ll keep for many months. 

Fortunately, it’s really easy to use, you just need to follow our guides here.

  • 1kg or 1.5kg (depending on selection) premium millet grain, packaged and sterilised in industry leading Unicorn grow bags with injection port  
  • Our Lifetime Guarantee  

WE DO NOT INCLUDE

Spore or liquid culture syringe: Liquid cultures for gourmet varieties are available here.   

Physical copy of the growing guide: You can find our online step-by-step mushroom growing guide here, as well as some of our own tips and tricks for optimising your grow. We highly recommend reading it before purchasing!  

Please aim to use your Blank Grain Spawn Bag soon after receiving it. If you are not using right away, store the bag in the fridge. Stored this way, your spawn should last at least 3 months.

Our optimally hydrated millet and milo grain is one of the best options for spawn production. It is superior to many other grains like rye as it colonises more rapidly and resists contamination; mycelium just loves it! 

Our grain spawn is highly versatile and can be used with a variety of different mushroom species, from exotic, functional, or gourmet fungi.

Please refer to our delivery details.

It will depend on a few different factors, mainly temperature. But it will range from about 4 to 8 weeks.

Biological products, by their very nature, can be unpredictable and sometimes things don’t go as planned. Growing mushrooms is always a battle against contamination, and sometimes it wins.  

When things go wrong, don’t worry. We offer replacements for contaminated kits or substrates as per our guarantee.

This is a common issue that can occur during the growing process, but don’t worry, it is usually pretty easy to overcome. In fact, we’ve put together a handy troubleshooting guide to help answer the most common issues people have when growing mushrooms.  

If you have any further questions that aren’t covered in the guide, then please don’t hesitate to ask. We’re always happy to help as best we can.

Yields can vary substantially based on the genetics of the mushrooms you’re growing, conditions, amount of substrate and size of the spawn you purchased. Typically, you can expect to grow:  

  • 1kg spawn bag: 500g+ fresh mushrooms 
  • 1.5kg spawn bag: 750kg+ fresh mushrooms

If we did not answer any of your questions above, then contact us here. We are always happy to help and look forward to hearing from you.