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Sterile Corn Spawn Bag

Ready-to-use sterile corn spawn bags for growing mushrooms, available in 2 and 4 litre sizes. Each bag has a handy injection port for adding spores or liquid culture and a filter valve for optimal gas exchange.

Perfect for growing various mushroom species and ideal as a basis for your monotub setup.

Availability: In stock

As low as: €19.95

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Price as selected: €19.95

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Product Description
Details

Our sterile corn spawn bags have been prepared with the utmost care to guarantee optimal results for both novice and experienced mycologists. The corn is carefully hydrated to the perfect moisture content and then thoroughly sterilised to create a contamination-free environment for your mycelium.

Each bag has a self-healing injection port, allowing you to easily and sterilely inject your liquid culture or spore suspension. The integrated 0.2μm filter valve ensures optimal gas exchange while keeping contaminants out of the bag.


Instructions for use

  1. Inoculation: Inject 2.5-5cc of your liquid culture  or spore suspension  into the injection port. Put on clean gloves to prevent contamination.
  2. Incubation: Place the bag in a dark place at room temperature (20-24°C).
  3. Colonisation: When you see that the mycelium has grown to about 7-10 cm, gently knead the bag to spread the colonised grain. This will speed up the whole process.
  4. Ready for your monotube: As soon as the whole bag is white with mycelium, you can mix the contents with substrate in your monotub. Mix about 1 part colonised grain with 5 parts substrate for the best results.

These sterile corn spawn bags are the perfect starting point for your magic mushroom culture. Once your monotube is fully colonised, you can expect multiple flushes (harvests).


Which mushrooms can you grow?

These spawn bags are perfect for all kinds of Psilocybe cubensis species such as Golden Teacher or Mexican and all the others. They are also suitable for delicious edible mushrooms such as oyster mushrooms in different colours, shiitake and Lion's Mane.

For some special varieties such as Psilocybe cyanenscens , azurescens or zapotecorum , you use this bag as an intermediate step. These mushrooms grow better on wood chips  or straw . In that case, you use the fully colonised grain from this bag to mix with those materials for the final mushrooms.

Storage


You can store the unopened bags at room temperature, as long as they are kept out of direct sunlight. They do not need to be refrigerated and will keep for several months.

Additional Info
Additional Info
Productcode MCS.GKADV.BUNDL-LG
Weight (KG) 1.6000
Origin No
Sterile No

Customer Reviews

7 Item(s)

per page
Wow, fast!! Review by Al Kilmer
Rating
These bags colonize quick!! I did a BnS a week after innoculating and it bounced back and fully colonized within 3/4days! I couldn't believe how fast it was. This was my first time using corn and will be ordering more of these again for sure once my current grow nears complete. (Posted on 8/6/2025)
Good Review by Sehuti
Rating
Good and fast but better with lower temperatures, summer time without air conditioner can get tricky (Posted on 7/27/2025)
Sterile Review by Sehuti
Rating
Good sterile corn bag, fast colonization, works everytime, ordering every month. (Posted on 5/30/2025)
Never failed me Review by Sehuti
Rating
Im basically on monthly subscription with this and it has never failed me (Posted on 5/14/2025)
Works every time Review by Sehuti
Rating
No problems, fast and works everytime (Posted on 4/29/2025)
Excellent, recommend Review by Marcin
Rating
Nice sterile and big bag, must have for all mushrooms lovers! (Posted on 4/23/2025)
Excellent, recommend Review by Marcin
Rating
Nice sterile and big bag, must have for all mushrooms lovers! (Posted on 4/23/2025)

7 Item(s)

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