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Mexican XL Mycelium box (2100 ML)


Mexican XL Mycelium box (2100 ML)

This Mexican magic mushrooms XL-Mycelium Box is an enhanced Mycelium box with 80% more substrate than our medium kits (2100 ML as opposed to 1200 ML for the medium kit). The Mexican mushrooms are without a doubt the most famous mushrooms and among our top 3 best selling mushroom strains. Great yields and spectacular experiences.

This XL-Mycelium Box contains the mycelium of the Psilocybe cubensis 'Mexican' strain. The Mexican mycelium is colonized on a substrate of rye and perlite. The top layer is covered with vermiculite.

Our online manual for the mushroom mycelium kit can be viewed at www.mushroomgrowbox.org.
There are no paperclips included.

Holding the double of the substrate, meaning the double of the expected Mexican mushrooms yield, the XL-MyceliumBox is an enhanced product allowing the formation of exceptionally big Mexican magic mushrooms in an exceptional short amount of time.

Because the kits are fresh we recommend to set them up right away.

Mushroom Stopper - Bad Trip Stopper
If this will be the first time you use magic mushrooms, make sure that a sober friend is around to help you out in case you feel uncomfortable, sick or scared. Click here to buy our Mushroom Stopper. Our Mushroom Stopper, it helps you to get out of your trip.



We do NOT ship to countries outside the E.U.

If in doubt, please contact us and we will inform you if we will ship these XL mushroom boxes to you!!!

Mushroom growbox manual


Step 1
Wash your hands thoroughly and clean the outside of the grow kit with a clean, damp cloth. Remove the lid, but keep it for step 3.

Step 2
Fill the kit with water up to the edge of the kit (20 º C). Place the lid and let the mushroom growkit soak for 12 hours ( if this is your second flush you let the kit soak for 8 hours).

Step 3
After soaking, remove the lid of the grow kit and carefully pour off the water, until the last drop.

Step 4
Add warm water (20 º C) to the grow bag.

  • For the 2100cc grow kit: 2 cups (0,5 liters)
  • For the 1200cc grow kit: 2 cups (0.5 liters)
  • For the 250cc grow kit: 1 cup (0.25 liters)

Put the grow kit in the grow bag. Make sure the water does not go over the edge of the grow kit.

Step 5
Close the growing bag by folding the top of the bag and secure it with one or two paperclips (part of the grow kit package).

Step 6
Put the grow kit in a place out of direct sunlight but enough daylight, and not on or near a heater or heat source. The ideal temperature is between 20 and 25 º C. Make sure there is sufficient sunlight.

Step 7
The first mushrooms will be visible in 10 to 12 days.

Step 8
The mushrooms should be harvested just before the skin underneath the hats starts to loosen up.
The harvest: grab the stem gently and turn the mushroom to the left and than to the right and gently pull. This way you can remove the mushroom as complete as possible. This way you can reuse the grow kit.


Enjoy your shrooms!

new flight
After harvesting, clean the surface of the grow and remove the old and dead mushrooms, so the new mushrooms have the ability to grow. Put the grow kit for the best results in the refrigerator overnight. Caution! Not colder than 2 ° C.

Start again from step 2 for the next harvest.



  • The ideal climate is 22 º C.
  • Work very clean!
  • When using a heating mat, make sure there is between the heating mat and the growkit. (1 cm) 
  • Don't use a heating mat for temperatures above the 20 degrees. 
  • Try to avoid mushroom spores on the substrate, it will kill the mycelium.
Mexican XL Mycelium box (2100 ML)

Stronger than expected. In total was around 80g of dried mushrooms. Recommend it. Always easy and nice service on this website.
Evaluation: [out of 5 Stars]

Ich würde hier noch nie enttäuscht.

Echt schnelle Lieferung. Nach 8 Tagen, entsprechend Anleitung, sprießt ein Wald vor sich hin.

Bin gespannt auf die Ernte und die zweite Runde.

Top! Thx

Evaluation: [out of 5 Stars]

(Hans aus Holland)
Super fast delivery.
Kundenkontakt verbesserungswürdig.
Qualität ist top.

Evaluation: [out of 5 Stars]

Hallo zusammen Habe mir den growkit geholt mit mexican Pilze schnell Lieferung. als nach 1.5 Monate nichts gewachsen ist hatte ich den Support kontaktieren und mir wurde eine neues growkit zugesendet es ist wieder daß selbe Problem daß Nichts wächst Support antwortet nicht mehr.
Heitzmatte wurde verwendet und sauber gearbeitet sprich Hände waschen und desinfieren. Geld ist Weg und nicht davon gehabt. Ich persönlich empfehle es niemand es zu kaufen.

Evaluation: [out of 5 Stars]

It need about 3-4 Weeks for the first pins dont give up they are coming but it need some time :)
Evaluation: [out of 5 Stars]

(Muffin )
Very easy to Use, my First harvest was 199,99 gram. The Trip was nice... 6 hours of laughing.
Im exited for the next flush.
Great what you Do.
Greetings from germany

Evaluation: [out of 5 Stars]

Cant recommend it, it was probably a bad batch or I'm just unlucky.
I had a lot of different medium/ small sized kits and I always got a high yield. This time with the 2100 ml box I got like 4grams of dried mushroom which is really really bad!
I know how to handle these kits, I always use build Water, constant Temperature, no direct Sunlight and so on. So its not my fault.
It took around 4 weeks (Yes, four!) until the first mushroom appeard.

Evaluation: [out of 5 Stars]

Sehr schönes Set.
Gute Qualität der Box.
Super schnelles Wachstum wie beschrieben.

Beim ersten Flush schöne Resultate erziehlt, flusht immer noch.

Bin mal gespannt auf den zweiten Durchgang.

Evaluation: [out of 5 Stars]

(Dennis Wochner )
Super schnelle lieferung, alles gut geklappt.
Erste Ernte 21 Gramm trocken und sehr angenehmer Flash. Jetzt das zweite mal eingeweicht und nun mal schauen :)

Evaluation: [out of 5 Stars]

quand cet article sera t'il en stock ?
Evaluation: [out of 5 Stars]

(Pawel kapica)

I am not really satified with this Growkit. Maybe I was unlucky and I got an old batch or something. I waited way longer than the instructions said, under the exact conditions. I had a thermometer in my room and I sprayed every day. After around 30 days with no sign of pins and reading through many forums I decided to try a so called fruiting chamber, because I think the bag doesn't allow for enough surface for the water to evaporate ( basically a bigger plastic box with wet perlite inside and allowing for regular air exchange). Slowly some pinning occured but still very slow growth and only 10g dried material in first flush. Really must be old batch compared to what the product description states. I am now in my second flush with no pinning so far after 2 months...kinda dissapointed. But delivery was fast and reliable...Also a few filter bags for several flushes would have been nice to avoid contamination when reusing the same bag...especially with such a big box, but i will go with fruiting chamber from now on anyway

Evaluation: [out of 5 Stars]

First time grow and first try. Wauw. Was first neurvues for the growing. Got heat wawe. But I think i got around 120 dry from first havestole. And it's working nice and Calme. Already waiting for my next boxes. By the way it stop me drinking alkohol and my karma are with no doubt better.

I took 6 grams dry. And after 2 hours 5 more.

Evaluation: [out of 5 Stars]

(christophe valles)
its amazing, ....
shipping was there in 3 days.

I had a harvest of approximately 2Kg from an Xl Box and it was perfect. ;)

Evaluation: [out of 5 Stars]