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.

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.

If you do not want to start growing immediately after receiving the mushroom kits, the best place to store them is your refrigerator (not your freezer!). Do not store them longer than 2 months.

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 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 5 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)
Review 1 to 6 (of 6 reviews) Result: 1

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]

Very fast shipping. I set up the Box as instructed, but only 2 mushrooms were growing, they grew in the edges of the box, none on top of the substrate, dont know if it is supposed to be like that. Only one flush. Upon request for refund, I got another Box from the friendly customer support. The yield from the refund box was a bit better, got about 20g (dry weight) mushrooms. But also only one flush. Upon request to send another Box due to poor yield, my request was ignored, which was very disappointing because I paid 45€ for a Box which is supposed to give four flushes full of mushrooms....

Other than that, the mushrooms were powerful with great visuals and hallucinations. I took 4g of dried (dried in air for 2-3 days, stored in aluminium foil in the fridge) on an almost empty stomach which is more than enough! After 15 minutes, they kicked in. Walking felt very funny, speech got a bit slurred and thoughts deepened. My sense of time and reality faded, until it was not present at all. That state was overwhelming!!!!

Try to grow them in a warm and humid environment, they need heat to grow fast and nice. The taste is not so bad.

All in All, the trip was superb, great visual effects, nice state of thoughts, and interesting cognitive changes, highly recommended!!


Evaluation: [out of 5 Stars]


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]

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]