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Thai 'Koh Samui' Supagro Grow Kit with 100% colonized substrate

Thai Koh Samui magic mushroom kit from SupaGro. Tourists have come back from Thailand with stories of magic mushroom milk-shakes that have brought them wonderful moments. Now you can bring Koh Samui into your house with this Thai Magic Mushroom Grow Kit and enter the colorful world they have visited. Thai are small magic mushrooms with large caps and a high yield.

The substrate of the myceliumboxes by SupaGro is 100% colonized. Big First flush of very potent magic mushrooms!

Availability: In stock

Product Description

The Thai 'Koh Samui' magic mushroom grow kit is a product of the SupaGro company. This company redefines the way magic mushroom grow kits are produced. A whole newly developed method of producing these Thai 'Koh Samui' magic Mushroom grow kits has been developed. This has resulted in magic mushroom grow kits that can proudly wear the name: SUPA!

When comparing Thai 'Koh Samui' SupaGro magic mushroom grow kits to the standard magic mushroom grow kits, there are differences you should be aware of:

  • The first two flushes are Supa Large! Up to 300 grams per flush*
  • The first flush comes faster. First results can be expected after only a few days.
  • Substrate is 100% colonized by mycelium.
  • Very contamination resistant.
  • A totally new designed SupaBag with venting holes. The substrate with mycelium (also called cake) really needs to breath.
  • No layers of vermiculite on top and no perlite on the bottom.
  • The lid has venting/expansion holes.


SupaGro Grow Kits look different than other grow kits

The Thai 'Koh Samui' SupaGro magic mushroom grow kit is different than the grow kits you might have seen before. After opening the carton box you see it. In plastic lid, eight holes were drilled. These holes were part of the production process.

You might have received a Thai 'Koh Samui' SupaGro magic mushroom grow kit with the lid partially opened up. Sometimes this happens during transport. This is caused by a combination of the production process on one hand and the mycelium trying to expand on de other. When the mycelium is so well developed, it might push the lid up creating small openings. Don't worry, when this has happened, just continue with the procedure. The mycelium is so strong and well developed by now, contaminants well have a hard time to infect your Thai 'Koh Samui' SupaGro magic mushroom grow kit.

Don't test this by not working hygienically. We recommend always using surgical gloves or a good disinfectant when handling the kit. You should use a facemask to avoid breathing into the SupaBag and on the cake.

The SupaBag has holes

The SupaBag has two rows of holes. The top row is to let the oxygen in and the bottom row is to vent carbon dioxide out. There is no need to open the bag for ventilation as you might normally do with the standard grow bag with microfilter. When the SupaBag is placed correctly, this allows an optimal respiration gas balance for the mushroom growth.

How to store the grow kit correctly

It is recommended to start the cultivation process right away. If you decide to start growing later, you may store the Thai 'Koh Samui' SupaGro magic mushroom grow kit inside a Soaking Bag in the refrigerator (2°C to 8°C) for 6 weeks.


  • 1x SupaGro grow box – This contains substrate with active mycelium (the cake)
  • 1x SupaBag – The bag has 2 layers of punched holes for ventilation.
  • 2x paperclip – For closing the grow bag.


You need

  • Misting Bottle  – Misting is needed for the humidity level
  • Potable water – For misting and soaking
  • Clean environment – Work clean to give other fungi and bacteria (micro organisms) no chance to contaminate.


We recommend using


How to prepare the room and yourself before you begin

  • Close any open windows. Wind or draft may bring micro organisms that can contaminate the Thai 'Koh Samui' SupaGro Magic Mushroom grow kit.
  • When taking out the grow box with the cake from the carton box, put it on a disinfected surface. If this surface would not be clean, micro organisms may attach to the grow box and will flourish inside the Thai 'Koh Samui' SupaGro Magic Mushroom grow kit, and will contaminate the grow box.
  • Make sure you work with clean hands and arms. We recommend using surgical gloves or a good disinfectant when handling the kit. You should use a facemask to avoid breathing into the grow bag and on the cake.


Starting the process

Do not soak the grow kit! This is not needed at this stage.

  1. Place the grow box inside the SupaBag. The open end of the SupaBag should point upwards.
  2. Remove the lid from the SupaGro grow box. Rinse the lid, dry it and store it in the carton box for later use.
  3. Fold the open end of SupaBag twice; do not cover the venting holes.
  4. Place the paperclips on the fold, so the bag stays closed. Now the Thai 'Koh Samui' SupaGro Magic Mushroom grow kit is ready to grow.
  5. Place the Thai 'Koh Samui' SupaGro Magic Mushroom grow kit inside the carton box, on top of the lid.



The ideal temperature is 24°C. Do not have the temperature drop under 18°C and not exceed 29°C. SupaGro does not recommend using an heating mat with their magic mushroom kits. Using a heating mat is at your own risk, no guarantees can be given. 


The Thai 'Koh Samui' SupaGro magic mushroom grow kit only needs light for the mycelium to ‘understand’ it has reached the surface. Only then, mushrooms will grow. A few hours of fluorescent/artificial light or indirect sunlight a day is more than enough. Direct sunlight kills the mycelium, so avoid the sun to shine directly on the grow kit.

Water / Misting

Misting should be started with on the day that the first mushrooms (pins) appear. Open the grow bag by removing the paperclips. Do not spray directly on the cake, but spray one time against every side of the bag. So you mist once a day, four sprays but only when the mushrooms are visible. Right after misting, close the bag again with the paperclip.


If the conditions are optimal, you can expect the first small mushrooms (the pins) to appear between 5 and 10 days. This also depends on the strain. Some cubensis strains grow slower than others.


The mushrooms come up in groups. This can be a small or large group. That depends on the strain. A growth like this is called a flush. Mushrooms are almost never ripe at the same time. You can get more than one flush out of a kit. The first two flushes are the largest. When more flushes come, they will be smaller than the previous one.


Mushrooms are ripe and should be picked when the veil between the hat and the stem has just torn. Don’t wait much longer. Use surgical gloves or disinfect your hands, wrists and arms. Pick the mushrooms that are ripe and let the others continue to grow. The cake has no top layer such as vermiculite. This makes is much easier to pick the mushrooms than with the standard grow kits. The mushrooms can easily be pulled out of the cake by holding them between thumb and index finger. They mushrooms let go almost immediately. When most of the larger mushrooms have been picked, also pick the smaller ones and the pins as well.

Mushrooms that grow from the sides

Mushrooms grow where the light reaches and where there is little penetrating resistance. Because the cake has light shining on the sides, the mushrooms might also grow there. It is hard to counter this and can be allowed. Some growers wrap the sides of the grow box in aluminum foil to keep the sides dark, but this doesn’t always work well.

When mushrooms grow there, they can be picked just before you soak the kit:

Clean hands! Take the grow box out of the bag and place it upside down on your other hand. Wiggle the plastic box so that the cake will fall out, onto your hand. The plastic box can be placed on a disinfectant surface. Now you have this hand free to pick the mushrooms from the sides of the cake. When all mushrooms are picked, you can place the cake back as it was, in the plastic box and continue to the soaking process.


After all the mushrooms have been picked, you prepare the kit for the next flush. Again, with disinfected hands or gloves; take the grow box out of the SupaBag. Fill the box with fresh, potable water. Take the lid out of the carton box and use it to close the grow box. Place the closed grow box in a soaking bag or use your own clean plastic shopping bag and wrap it around the box. Close it well and place this in a refrigerator (2°C to 8°C) for 12 hours. This is called the soaking process. Water will now soak through the cake, preparing it for the next flush.

During the soaking you can hang the SupaBag upside down to dry. Make sure to hang it upside down, so no microorganisms will access the bag.

After 12 hours take the soaking bag with the grow box, out from the fridge and unpack it.

Next Flush

To continue, follow the same steps 1 – 5 as before when you started the process for the first time. Several days later, a new flush will appear. You can get at least 2 large flushes out of a Thai 'Koh Samui' SupaGro Magic mushroom grow kit. If you are experienced enough in cultivating, you can get more flushes out of a Thai 'Koh Samui' SupaGro Magic mushroom grow kit. Up to 8 flushes!

The end

When no more mushrooms grow out of a grow kit after the second flush for at least three weeks, or when the Thai 'Koh Samui' SupaGro Magic Mushroom grow kit turns green, red, grey or yellow; the grow kit can be disposed of.  The change in color is a sign that the grow kit is contaminated with another fungus or a bacteria. No more mushrooms will grow out of the Thai 'Koh Samui' SupaGro Magic mushroom grow kit and the grow kit should be thrown away in the garbage outside.


When you are too late picking the mushrooms, they will drop their spores. The cake and the mushrooms will turn black/purple (some other cubensis strains red/brown) because of the spores. This is not really a problem; it just doesn’t look very pretty. When mushrooms release their spores, they also start to degrade and the active ingredients are breaking down. Mushrooms will lose some of their potency.

Be sensible

Check out the responsible use page for more information on do’s and don’ts.

This kit is meant for small-scale home use only.

Additional Info
Additional Info
Productcode mb-sg1th
Weight (KG) 1.0000
Alternative product: No
Grow Kit type SupaGro
Difficulty Very Easy
Size 1200cc
Species Psilocybe cubensis
Origin Thailand
Potency Average
Optimum cultivation temperature 23ºC
Yield (from) 300 grams
Yield (to) 600 gram
Water Spray Needed Yes
Not shipped to: Non EU countries, Africa, Asia, Australia, Caribbean, Central America, Cyprus, Germany, Iran, Middle East, South America, Canada, Estonia, Finland, Israel , New Zealand, Norway, Russia, Switzerland, Turkey, United Kingom, United States
Customer Reviews (22)
its not that good , i like more fresh ones
supa grow is more for labs, then for home , i didnt like the open holes on bag, that how bacteria goes in and then you dont get much Review by Dorijan (Posted on 3/7/2019)
Great value, great product
kit worked perfectly, strength is that of a normal cubensis, the mushrooms grow quick, large, and plenty Review by Jo (Posted on 9/6/2018)
First time growing, had pretty good results. Fairly straight forward to achieve. Quality of mushrooms very good, very strong. I would probably go for something different next time to see how they differ in effects. Overall very positive and fun experience seeing the growing process...nothing, nothing, nothing...mushroom explosion! :) 15 days I think, pretty fast really. Read all info on the specific grow box page to really understand the process, as the grow instructions are very brief and you will have questions otherwise. Review by j Rills (Posted on 6/14/2018)
5 stars!
very happy with this kit! 610g harvested so far, with a 5th flush coming up soon. fast growers! Review by Joe Rafferty (Posted on 6/9/2018)
Not a single flush.
This grow kit didn't produce a single flush unfortunately. I'm unsure if it was fully colonized before it was sent because it's the first one I have had that has failed so far.
Looks like I'm not returning to Thailand anytime soon
Review by Matthew (Posted on 1/3/2018)
EXCELLENT ! delivery is fast , and especially the after sales service is really cool !!
I recomende the golden teacher !!
PS: it's worth the cost to take a box XL
Review by dylan (Posted on 9/15/2016)
Perfect for first-timers!
I´ve had my first time shroom experience with those Koh Samuis and it was just perfect... We took 3 g mushed into a banana. We drank a tea during the come up to counteract the nausea, wich really helped. Within 15 min of the trip we started to feel `sth coming`, a feeling that we didnt know that kept getting stronger (in a nice way). We were sitting on the balcony with a view over the city and a huge tree right in front of us. Colors kept getting brighter und more intensive. The sky was kind of dull that day but within 40 min of the trip we startet to see moving patterns, the building on the other side of the street startet to transform in a weird and colorfull way... and then there where those two pigeons sitting in the tree in front of us... i usually am not too fond of pigeons, but theses two where most majestetic creatures I`ve ever seen in my life :D they where huge and purple and spakly :D I could go on and on with what weve seen and what weve experienced but its just impossible to describe.
After all I can say that for me as a first time shroomer these shrooms and the dosage was perfect,I havent had one scary moment and I felt save trough the entire trip (wich only lasted like 2 hours).

Unfortunately there was building mold in the GrowKit after my first flush even though i totally followed the directions.
Review by Jewdy (Posted on 5/27/2016)
Great shrooms and a great service
I love these things,I've had beautiful even life changing experiences on them and growing them was surprisingly fun too.

The yields were great but the first flush is always difficult to pick without damaging the mycelium because they're so densely packed together.It helps to use a scalpel.This isn't a problem on the second flush as there are usually fewer but much larger mushrooms.The largest I harvested was about a foot long with a cap the size of my palm.It weighed 25g
fresh XD.

Avg 1st flush is usually just over 20g dried
Avg 2nd is either the same or slightly lower.
Review by Duck (Posted on 12/25/2015)
Big yield
Good and quick delivery,

My first flush was 400 grams of fresh mushrooms. Surrounding temerature was 21 +/- 1 degree, while inner temperature of the box was 23,0 +/- 1 degree (= optimum)

So the mycelicum produce some heat white growing.

From pinhead to full grow mushroom only in 4 days!!

Review by Dolf (Posted on 6/28/2014)
The customer service was excellent I always received instant response to my queries. I received the grow kit box two days from when I first placed my order. When I received the grow kit I noticed that the spawn bag was missing so I had to re-order the bag from them since I couldn't start without it, and that itself was a problem since it increases the chance of damaging the mycelium. Also I noticed that the box looked rather odd, nothing like the picture , at first I thought that's how its supposed to be however it became apparent that it was a sign of contamination. I couldn't grow the mushrooms because the contamination had spread all over the box before I got a chance to actually grow anything. This could be due to the way it was delivered, the box should be stored in a dry cool place which obviously my box did not meet those conditions.

Review by Rashed (Posted on 4/17/2013)
Rapid development, but it is impossible to harvest without damaging the surface. The wet weight of 1/20 dry out. Blue color is minimal. The effect is unpleasant, tension, zero visuality. Unfortunately, nothing to do with the typical Thai trip. The first real disappointment in the offers of MMS. Review by András (Posted on 3/12/2013)
Awesome customer service 5*!!
And the product was veeeeery good!
Review by christiano (Posted on 2/21/2013)
Very good trip!:)
Boas! Antes demais quero agradecer á magic-mushrooms-shop pela sua eficência e qualidade...respeitando todas as informações passado 2 semanas e 2 dias colhi a minha primeira colheita pois os chapéus dos cogumelos já estavam todos a revirar...colhi precisamente 120gramas...bem peguei em tudo e fui eu a minha mulher e mais 2 casais para o campo...primeiramente bebemos um chá de "peganum harmala" para intensificar o efeito dos cugas, passado 40 min comemos então os cugas, eu comi 26gramas + 1 amigo meu, o outro rapaz comeu só 20 porque era a primeira vez e elas comeram todas 16gramas porque tambem era a primeira vez...passado 30min começamos a sentir os primeiros efeitos, estavamos todos muito bem dispostos, podemos dizer que tivemos 30min só de rir!:) depois veio tudo muito rápidamente e entrámos num mundo cheio de cores e visões...estivemos em contacto com seres de outras dimensões ( extraterrestres) que nos trouxeram muitas mensagens sobre coisas que vão acontecer no mundo...fomos avisados que em breve haverá um grande tsunami em Portugal!O mais incrível é que todos recebemos a mesma mensagem!!!Vimos naves espaciais, vimos Shiva, Ganeisha...que viagem meu Deus!:) Foi sem sombra de duvida a viagem mais linda e intensa que tive na vida!:) e quando fechava os olhos sentia o meu espirito sair do meu corpo, o que me assustava um pouco, logo evitava de fechar os olhos pois tinha todas as visões de olhos abertos!Recomendo vivamente esta mistura (inibidor de MAO + Psilocibina= Pislohuasca) muito bom!:)
chegámos a conclusão que tudo o que é material não interessa...aliás o mundo terreno foi estragado pelo homem, todos os principios que nos incutem desde que nascemos estão errados, o nosso planeta está muito doente derivado aos maus tratos que o homem lhe tem dado e ele vai-se revoltar e manifestar , tudo o que é material não interessa, aliás ja o tem feito e vai continuar a fazê-lo!a vinda do ser humano a terra é para evoluir como espiritos, meditanto e contactando com o universo e não apegando-se a bens materias...Uma nova Era virá...Uma Era em que todos estaremos no mesmo plano, em paz e harmonia sentindo um amor incondicional por tudo e por todos!Preparem-se espiritualmente para tudo o que vai vir pois não será fácil...e aceitem pois nada poderemos fazer a não ser aceitar.Tive uma viagem intensa de quase 10horas que foi baixando gradualmente até as 16horas +/-...1 Abraço para todos e boas viagens!:)
Review by João (Posted on 8/31/2012)
the most amazing trip
First, thanks for the mushroom Magic Shop, reliable, helpful team, the delivery is really fast, up to 2 days. The yield of Thai boxes 40 - 50 g dried. Stable, forgiving, less ventilation is well tolerated. The experience is powerful, deep insights, exuberant laughter, very euphoric and beautiful visualization. The effect comes quickly. 5g over the vigorous hallucinations, the last time we traveled with my girlfriend in a botanical garden, which is true Fairytale changed around us, ourselves as we have seen and felt amazing creatures. Was indescribable. Incredibly, it opened its doors in the mind where we go into other realities. The Thai is my personal favorite, everyone would like to recommend, but be cautious of new travelers, their 7 - 8g is not advisable at first. I am grateful for MMS that experience I developed. Review by Semos (Posted on 8/13/2012)
Thaiful mood.
The thai shroom is with the B+ strain my favorate strain with its big yields of around 40 to 50 grammes of dried shrooms per boxes. It grows well and quickly and has a nice social high making good for partys. they enhance the colours nicely.with a dose of about 1.5 to 2 grammes of dried shrooms. I have tried many thai boxes with out any problems but the last two I ordered I just not growing. Bad patches do happen but Magic Mushroom Shop stays a highly professional site. Review by Hidding Bunny (Posted on 7/23/2012)
really good harvest
MM shop does great service, you can trust, these shrooms can go really tall if they have to go after the light, so my advice less light, bigger shrooms, couple of days under the bed make them 20cm, cool trip, laughing, body high, I took only 3 bigger, if you take more you can expect thai beach in your head Review by peta (Posted on 5/13/2012)
Thai surprise.
I got just under 0.5kg (500g) after 4-5 flushes. Great delivery and the box is perfect. It is rye grain too. I got an average 120g per flush. Never pick the smaller ones if you have a lot of them left after picking the ones that are nearing broken veils. You can double yields that way when they grow bigger after a few days. Didn’t get any big impressive shrooms but loads of long thin ones. I had to take more than 5g dried to see open eyed visuals. Closed eyed I got kaleidoscopic imagery. Very big body rush. Almost like MDMA. Great for music listening. Made some spore prints these were so good. If you want open eyed visuals you just need to take more and you need to take breaks for physical tolerance to decrease (10 days). I took them using Lemon tek drinks. I had my best trip so far on Thai (7g dry trip). I highly recommend getting a box of these. You will not be disappointed. One of best strains around really. Review by Altered States of Consciousness (Posted on 4/23/2012)
Nice trip
I toke 17 grams for my second time and i saw many many strange things..i remember wonderful clouds and all my room was moving and my lamp was getting was wonderful Review by Matteo (Posted on 4/13/2012)
Quality mushrooms
First of all the shipping was extremely fast. I live in scandinavia and it still only took 2 days for it to come. I set up the myceliumbox in a closet with one small CFL-lamp. I'm still on the first flush almost a month later and there's still mushrooms popping up. To this day I think I've harvested about 30g dried mushrooms which is very good for one flush. The trip is very funny with a lot of insights and realisations and lasts about 4 - 6 hours. 4 stars is only because there was not so much visual effects although the mushrooms are top quality and turn blue when u pick them. Thanks Magic mushroom shop for a great service! Review by David (Posted on 2/3/2012)
as of yet have harvested approx 150g, after second flush. the weather fluctuates here...

the realisations and explosive laughter; the mushrooms are an elixir!
Review by T (Posted on 8/21/2011)

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Important information about SupaGro® grow kit Thai

  • You have to be 18 years or older to order this product
  • This product has shipping limitations. See the additional information to find out where we don't ship.
  • When you place an order you declare that you are aware of the legal status of the ordered product(s) in your country and that you are allowed to receive and posses these.
  • The use of magic mushrooms is at your own risk, so make sure to be well informed about the use and their effects.
  • The price does not include shipment.
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