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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.


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 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)

It took three weeks to harvest the first flush, got 14g dried. Not tried them yet but they look great. Looking forward to the second flush!
Evaluation: [out of 5 Stars]

Fast Shipping and good qualitat
Evaluation: [out of 5 Stars]

Unfortunately, they arrived already damp and slightly mildewed ...
Have it tried again but unfortunately nothing has grown except mold.

Evaluation: [out of 5 Stars]

Super happy with the results from this kit. Grow so much and still have just harvest first flush, waiting for more to come! Had a amazing trip on them as well. Recommend this
Evaluation: [out of 5 Stars]

they looked great and grew well, however they have no magic. Could it be because of hot weather they where shipped?
Evaluation: [out of 5 Stars]

Trip Report no 2;
Well I had increased dose from 5g to 7g. Taken in a dark room. This trip took a little longer to kick in but when it did the dark room illuminated by itself, the shadows were moving around. It was very intense for the first few hours. I put an intention in to heal past trauma's and wow did it bring some things back from the past. However i were prepared for this as its what I went into the trip with.
Ive been able to face these past trauma's and emotions and feel enlightened after doing so. I can sit and evaluate past traumas and let go of them. These Golden Teachers certainly do teach you a thing or two. I did have less visuals but internal visuals were extremely bright on this occasion. Highly recommended

Evaluation: [out of 5 Stars]