Golden Teacher XL Mycelium box (2100 ML)


This Golden Teacher XL-MyceliumBox is an enhanced Mycelium kit with 80% more substrate. The Golden Teacher is one of our strongest and most visual mushroom strains. This is not a strain for beginners!

This XL-MyceliumBox contains the mycelium of the Psilocybe cubensis 'Golden Teacher' strain. The Golden Teacher 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 Golden Teacher yield, the XL-MyceliumBox is an enhanced product allowing the formation of exceptionally big Golden Teacher magic mushrooms in an exceptional short amount of time.

Made for the amateur mycologist, the Golden Teacher XL-MyceliumBox highly reduces the probability of contamination and it's simplicity of processes will allow you to better focus on the amazing formation of mushrooms bodies. Made with the strongest redefined strains, growing mushrooms was never easier and more reliable.

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.
Golden Teacher XL Mycelium box (2100 ML)
Review 1 to 6 (of 13 reviews) Result: 123NextShow all

I live in Canada can someone help me out by buying a kit and shipping it to me afterwards
Evaluation: [out of 5 Stars]

lololol anyone can post reviews here?
Evaluation: [out of 5 Stars]

Fast shipment, mushrooms growing like insane, waiting for 2nd yeld already.
Evaluation: [out of 5 Stars]

Currently at Day 13, nothing happened so far. Like the review before mine, white at the bottom/side, but not at the top. Customer service hasn't answered aftet I wrote them two times already....... Bad
Evaluation: [out of 5 Stars]

How long did it take for your first pins to show ? I am @12 Days an nothing in sight. I did all like I am supposed to and the box is really white in the bottom region but not on top and no pins at all ...
Evaluation: [out of 5 Stars]

Very fast shipment. I followed all the instructions, but on the 6th day there was still no signs of growth so picked up the bag, checked the tub and on the bottom there was green mold! Won’t be buying ever again. Save your money, learn on forums how to grow and build your own terrarium. Waste of money.
Evaluation: [out of 5 Stars]