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Millet Grain Spawn and CVG Mushroom Substrate Bundle

Millet Grain Spawn and CVG Mushroom Substrate Bundle

£23.92 GBP
£29.90 GBP £23.92 GBP
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FREE DELIVERY ON UK ORDERS £50+
LIFETIME GUARANTEE

Keep your grows going strong with our Millet Grain Spawn and CVG Mushroom Substrate Bundle.  

Complete with our best-selling millet grain spawn blend, along with nutrient-rich CVG substrate, it’s designed to seamlessly refill your MonoTub for another round of growing. Simple, reliable and perfect for growers who want to continue harvesting with ease. 

🍄 Advanced grow kit for cultivators looking to maximise their yields  

⚖️ Grow large yields of up to 1.5kg+ of fresh mushrooms   

💉 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 kit 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 CULT CLASSIC METHOD FOR GROWING MUSHROOMS IN BULK 

The Millet Grain Spawn and CVG Mushroom Substrate Bundle takes the prep work off your hands so you can skip to the best part: watching your mushrooms grow! 

We all love a good grow, but it can take a lot of time and effort trying to gather all of the things needed to cultivate a successful harvest from scratch. This is why we've bundled together everything you need: our best-selling millet grain spawn and CVG substrate, expertly prepared and ready to use. 

No more hunting around for supplies or spending hours on prep. Just fresh materials, proven results and more time to enjoy the process. Perfect for refilling a Martian MonoTub, this bundle will keep you going grow after grow. 

Because once you've experienced that first successful harvest and caught the mushroom growing bug, you'll want to do it all over again.

THE BENEFITS  

  • Ideal choice for those looking for a bulk mushroom growing kit 

  • Grow large yields of  up to 1.5kg of fresh mushrooms  

  • Our versatile CVG substrate is perfect for exotic and dung loving species 

  • Guaranteed to produce mushrooms or we’ll replace your kit 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: Start by injecting the sterilised grain spawn bag with your chosen mushroom spores or culture (available separately).  

  1. Colonisation: Allow the substrate to colonise. Once at around 30% mycelium coverage, mix the bag fully. Our optimally hydrated millet and milo blend is superior to many other grains like rye as it colonises more rapidly and resists contamination. 

  1. Spawning: Once fully colonised, mix the grain spawn with the included bulk substrate bag (for a perfect 2:1 ratio) and transfer it to the MonoTub container. 

  1. Fruiting: Maintain the ideal conditions, and soon you’ll see mushrooms begin to fruit right before your eyes!  

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. 

GROWING CONDITIONS 

Temperature: 

  • Colonisation: Mycelium (the vegetative part of the fungus) colonises the substrate best at around 24-27°C (75-80°F)

  • Fruiting: For the fruiting stage when mushrooms begin to develop, slightly cooler temperatures (about 21-24°C, or 70-75°F) are recommended. 

Humidity: High humidity (over 90-95%) is essential for healthy, large fruits. Use misting, humidifiers, or a fruiting chamber to maintain humidity.    

Light:  

  • Colonisation: Complete darkness is preferred for rapid colonisation.    

  • Fruiting: Indirect sunlight or ambient light is sufficient. 

Fresh Air Exchange (FAE): Proper ventilation is necessary to provide the growing mushrooms with fresh air and prevent the buildup of carbon dioxide, which can inhibit growth.    

Sterility: Maintaining a clean and sterile environment is paramount to prevent contamination from other fungi or bacteria, which can compete with the mycelium and hinder its growth. 

INGREDIENTS  

Good ingredients make for excellent grow kits. That is why we only use 100% natural and organic CVG substrate and proprietary millet and milo grain blend in our kits. We only use the high-quality, natural ingredients for our products, specifically selected to support the optimal growth of mushrooms. 

Our Sterilised CVG Mushroom Substrate is a premium blend of coco coir, vermiculite, and gypsum, optimised for high nutrient availability and moisture retention. This substrate has been designed to support impressive yields while reducing contamination risks. 

We pair this with our optimally hydrated millet and milo blend. These small, nutrient dense grains are ideal for spawn production because they colonise quickly and resist 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. 

WHAT’S INCLUDED 

  • 1kg Sterilised Millet Mushroom Grain Spawn Bag + 2kg Sterilised CVG Mushroom Substrate Bag, or

  • 1.5kg Sterilised Millet Mushroom Grain Spawn Bag + 3kg Sterilised CVG Mushroom Substrate Bag

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!  

STORAGE 

Please aim to use your Millet Grain Spawn and CVG Mushroom Substrate Bundle soon after receiving it. If you are not using right away, store the grain and bulk substrate bags in the fridge. Stored this way, your bags should last at least 3 months.

  • EASY TO USE

  • MASSIVE YIELDS

  • SET & FORGET

  • SAVE MONEY

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What people are saying

MUSHROOM GROWING MADE EASY

  • 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
  • High yielding millet and milo substrate blend
  • Rapid colonisation times
  • Simple 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 Millet Grain Spawn and CVG Substrate Bundle. 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 grain spawn 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 by clicking here.

  • 1kg Sterilised Millet Mushroom Grain Spawn Bag + 2kg Sterilised CVG Mushroom Substrate Bag, or
  • 1.5kg Sterilised Millet Mushroom Grain Spawn Bag + 3kg Sterilised CVG Mushroom Substrate Bag 
  • 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 Millet Grain Spawn and CVG Mushroom Substrate Bundle soon after receiving it. If you are not using right away, store the millet grain and bulk substrate bags in the fridge. Stored this way, your kit should last at least 3 months.

Our Millet Grain Spawn and CVG Mushroom Substrate Bundle includes a sterilised grain spawn bag and a premium CVG bulk substrate bag containing coco coir, vermiculite, and gypsum. This blend has been specially formulated for exotic and dung loving fungi.

We don’t recommend growing more than one type of mushroom per kit. Growing multiple types of mushrooms may result in poor flushes.

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, environmental conditions and size of the kit you purchased. Typically, you can expect to grow 1.5kg+ of fresh mushrooms with this kit.

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.