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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.
There are no paperclips included in these boxes.

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 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.
Golden Teacher XL Mycelium box (2100 ML)

I am very satisfied with this kit. Had 5 flushes with almost constant and abundant yields. You just gotta invest some love, time, good music and lots of sanitizer and you'll be good. Both thumbs up for this kit!
Evaluation: [out of 5 Stars]

Amazing kit and musshies are amazing.
Good yields also, i managed to get 5 flushes from one kit and total around 90 dry .. these should be enough for winter days .

Thank you Avalon , i ll get back soon :D

Evaluation: [out of 5 Stars]

Really fast delivery ! I received it after two days.
I am stilll waiting for the pins to show up but so far so good!

Evaluation: [out of 5 Stars]

I am waiting for pins to show for about 2 weeks now. Since the mycelium still looks great, I am confindet, that they will grow soon.
Evaluation: [out of 5 Stars]

First flush was successful but kinda small
Evaluation: [out of 5 Stars]

Great Material and super Support!
Evaluation: [out of 5 Stars]

(Harsha Vemuri)
Decent yield. Around 400grams in 2 flushes

Evaluation: [out of 5 Stars]

These are VERY hard to grow. I only yielded about 5-10 grams (dry) from 3 flushes. I recommend getting the 100% mycellium kits over this one. Unless you're an experienced grower then these are great. Dont use the heating mats for these, they overheat them!
Evaluation: [out of 5 Stars]

(Chris Tame)
arrived quickly to Uk
this time i was a little disappointed with kit as only had 3 flushes and 1st one wasnt great less than 15gramms dry. and less 2nd and 3rd as all they did was grow round edges of tub.
and the potency was weak.
had 8g dry with maoi that was 3 of us aswell.
so this time only 1 star. last time i gave 5 stars.

Evaluation: [out of 5 Stars]

(Chris )
this kit has produced 6 flushes on average of 240g each time very potent mushrooms even microdosing 300mg with lionsmane you can feel the effects.
great product as always from avalon just bought 2 more xl kits

Evaluation: [out of 5 Stars]

Just terrible ,ordered 2 xl growing kits.Did all steps correctly ,now it past 17 days and no signs of life,just dead as it arrived.No white color or w/e.They are selling some bad stuff and should be reported.Shame on you!
Evaluation: [out of 5 Stars]

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]

(Muffin )
My second flush was about 260 gram.... Very nice....
Evaluation: [out of 5 Stars]

Placed my first order from Avalon recently. And had a go at growing these. They are really easy for beginners like myself. Simple easy instruction. Got two good size yields, harvested into around 100g dried.
Trip report.
I went for around 5g and wow did it kick in quickly. 25 mins in, the most magical and amazing journey began. From colourful visuals, intense spiritual activation, meeting entities and increased intuition. With a calm and more focused self for days after taking too.
Will be trying a higher dose soon.

Can highly recommend these golden teachers, easy to grow and magical.


Evaluation: [out of 5 Stars]

(Alex Pt)
Evaluation: [out of 5 Stars]

(Barry ellis)
My trip report. Took 3 dried grams.started to feel them working in 25mins. Started off with a feeling of deep relaxation. Which lead to a eurphoric feeling which lasted about an hour. Then went into deep thought mode with clear rotating geomagtric three dimensional internal visions. Which lasted for about 2 hours. Then went back into the relaxation eurphoric feeling for the remainder of the night . Loved it .!!!
Evaluation: [out of 5 Stars]

(Barry ellis)
First time growing these. Very easy. And all mushrooms were grade a quality. Well over average yield.
Evaluation: [out of 5 Stars]

Came in just 7 days to Latvia. I have grew mushrooms before, this package what came from Avalon is top quality and price is excellent!
I will use Avalon products further. :)

Evaluation: [out of 5 Stars]

Very fast shipping. Good-looking quality. Happy Shroom!
Evaluation: [out of 5 Stars]

Arrived in Italy 13 days after the payment by bank. Had to sign ordinary shipping, which shouldn't be the case, as I understood. Box, clips and bags. Let's see what comes inside! Can't wait!!!
Evaluation: [out of 5 Stars]

About 70-80% colonized. Got 4 pretty strong flushes. You get more shrooms after the first flush. Great strain!
Evaluation: [out of 5 Stars]

5stars .!!! UK buyer .!! Quick fast delivery.!! Package excellent .!! Very reliable.!!
Evaluation: [out of 5 Stars]

(Paul )
Great service from avalon, fast delivery, the product was great, managed to get four flushes from the kit with the first yield at 150g wet
Evaluation: [out of 5 Stars]

(Paul Graham)
Great service from avalon, fast delivery, the product was great, managed to get four flushes from the kit with the first yield at 150g wet
Evaluation: [out of 5 Stars]

Great Kit - Speedy Delivery - 1 Flush Limited with the grow back however. Flushes 2 - 4 were very strong and yielded well within a pf tech thanks avlon team!
Evaluation: [out of 5 Stars]

Excellent product. Seem to be more potent when consumed fresh as opposed to eating after dehydrating.
Evaluation: [out of 5 Stars]

Week 4 but it's only white at top and bottom. Nothing growing. Very disappointing.
Evaluation: [out of 5 Stars]

so im one day 7 and its all white not only the button.-the top too and i see 1-2 mini´s ...

maybe you guys didnt step it all up with a fork ? its a must so the white on the buttom can came to the top

Evaluation: [out of 5 Stars]

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

(weird guy)
lololol anyone can post reviews here?
Evaluation: [out of 5 Stars]

(Your name)
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]

(Piotr Affeltowicz)
That shrooms have grown reaaaaally huge! I'll order them again for sure.
Evaluation: [out of 5 Stars]

The avalon mushroom kits are the best and customer service is the best I've ever experienced, thanks avalon, keep up the great work
Evaluation: [out of 5 Stars]


Evaluation: [out of 5 Stars]

(Leon Kremer)
Payment, shipping, and most importantly growing the mushrooms all worked fine, this strain is pretty resilient from my experience. Will definitely buy again!
Evaluation: [out of 5 Stars]

(Dena Badjelan)
This is my 4th box of this mushroom, I've never got less than 100 grams (dry) from each box. The best Mushroom for spritual growth.
Great customer service and fast and discreet delivery.

Evaluation: [out of 5 Stars]

(Moussa Dieng)
Ich bin total begeistert von den Golden Teachers gewesen! 5 Gramm davon haben mich weiter weggebeamed als so mancher LSD-TRIP! Hammergeil!! Zeitweise habe ich nur noch Farben gesehen!!! Ein unvergesslicher Trip, aus dem ich sehr viel mitgenommen habe.
Evaluation: [out of 5 Stars]

I was so impressed!!! These was the Best shrooms
Evaluation: [out of 5 Stars]