Age Check

This website requires you to be 18 years or older to enter.

Sorry Adults Only

Magic Mushroom Substrate kit XL | Mondo® Grow Box XL

When you are looking for a high yield and absolute cultivation freedom, the MONDO® Grow Box XL is what you need. This mushroom grow box contains high quality and sterilized substrate.

The MONDO® Grow Box includes : Sterilized Substrate, Liquid Culture, Syringe, Alcoholswaps, and a Grow bag.

You can use the MONDO® Grow Box XL to grow medicinal mushrooms like Reishi and Lion's Mane, edible gourmet mushrooms like the Oyster mushroom or use it to spawn your own psilocybe cubensis magic mushrooms.

With the MONDO® Grow Box XL, spores are not included. You can choose to add pre-selected cubensis spores together with your kit with a 20% discount.

Made on order, shipped after 5 days

Sign up to get notified when this product is back in stock

Availability: Out of stock

As low as: €43.00

Product Description

Mondo® Substrate Grow Box makes it possible to grow fresh mushrooms in a matter of weeks. The kit contains everything you need to start cultivation, you add the spores and you choose how to grow.

What is a Mondo® Grow Box?

The Mondo® Grow Box contains an improved PF TEK or BRF substrate in an container with injection port. Mondo® Grow Box, is the ultimate mushroom grow experience without the hassle of making substrate.

The Mondo® Grow Box contains 2100c c/ml of sterilized substrate. The injection port makes it easy to inject your mushroom spores. This way you can inoculate the Mondo® Grow Box with any spores you like.

Mondo® Grow Box Includes:

  • Spawn box with sterilized substrate 2100 cc
  • Hypodermic syringe
  • Liquid Culture
  • Alcohol Swab
  • Instructions

You will need:

  •  An disinfected area to work
  •  Spores; a Ready to use Spore Syringe or Inoculated Liquid Culture vial
  •  Clean / Drinkable Water
  •  Waterspray / Misting bottle

Grow With Spores

You can choose your mushroom spores from a selection of spores vials we include to the product. The mushroom spores vials come with a 20% discount if bought together with the Mondo® Grow Box.

Why spore vials?

The spore vials are a unique way of handling spores, we prefer them over spore syringes for a few reasons:

  • Non Static: no spores sticking to vail
  • Easier to Handle
  • Better shelf-life and storage

Grow with Liquid Culture

You can inject the spores in the Mondo®  Liquid culture and let the spores germinate here. The mycelium grows in the Liquid culture vial. Using Liquid Culture will strengthen the mycelium, shortens the colonization time and gives a higher success rate.


Always store your substrate kit in a clean refrigerator ! We recommend to use the substrate kit as soon as possible. The kit can be kept under refrigerated conditions for up to 2 months.

Mondo® Substrate Grow Box Instructions

Before you start. Make sure your work area is clean and sterile. Make sure there is no draft if you cultivate mushrooms.

Wash your hands and arms every time before handling the mushroom substrate kit with hand disinfectant or antibacterial soap. As extra protection use disinfected gloves and a face mask.

Let’s get started and do the first step: Inoculate the liquid culture. If you want to inject spores from a spore syringe directly you can skip this step and move on the “Inoculation of the Substrate kit”.

Prepare the Liquid Culture

Wash your hands and clean the working area! .

  1. Shake the spore vial or syringe very good to make sure all spores are floating.
  2. Disinfect the injection site of the liquid culture and the spore vial or syringe with the alcohol swap.
  3. Inject 2 ml of spore solution in the Liquid culture

Shake the inoculated liquid culture vigorously once a day every day for 10 days Store the inoculated liquid culture in a place between 23-27 degrees Celsius. The liquid culture is ready when you see a cloud floating in the suspension. This is mycelium..

Your Liquid culture is ready, It is called the Master Culture, if used and stored properly you can have lots of mycelium from only a bit of spores..


  • If the liquid is murky, it means there is a contamination and the culture is unusable.
  • If you don’t use the liquid culture for 10 days, store it in the refrigerator

Inoculation of the Mondo® Substrate kit

Lay out all the materials you need on a disinfected work space. You will need:

  • Mondo®Grow Box substrate bag
  • Mushroom spore syringe or Liquid Culture with germinated mushroom spores,
  • Inject the needle of the syringe into the port. Add 2-3 drops of mushroom spore solution in every corner of the substrate and in the middle of the mushroom substrate bag.
  • A lighter or spirit burner
  • Alcohol preps
  • Disinfectant spray

Prepare your mushroom spore syringe with 5-10 ml of spore solution or use 25 ml of the Liquid Culture. This is enough spores to inoculate the Mondo® Grow Box substrate.

  1. Locate the injection port on the substrate bag. Clean it with an alcohol prep.
  2. Now get your spore syringe or Liquid Culture syringe and heat the needle, red hot, with a lighter to make it sterile. Let the needle cool off for a few seconds.
  3. Inject the needle of the syringe into the port. Add all of the mushroom spore solution in the substrate kit.
  4. Turn and Shake the kit 360 degrees in all directions , to spread the spore suspension.
  5. Store the kit in a dark place with a temperature between 23-27 degrees Celsius.

After inoculation the mycelium will form and slowly grow over the substrate. This is the process of colonization.


To let the mycelium grow and colonize the substrate you must keep the Mondo® Grow Box in a dark space with a temperature between 23 -27 degrees Celsius.

After 3-5 days you will see the mycelium starting to grow from the spots were the spores were dropped. The mycelium looks like cotton and becomes more stringy while developing and colonizing the mushroom substrate.

It takes 2-4 weeks for the mycelium to colonize the substrate in the box. No empty spots of substrate should be left..

Wait an additional 5-7 days to make sure the inside of the substrate is colonized by the spores too. Now that mushrooms substrate is fully covered by the mycelium the kit is ready to be prepared for fruiting.

Growing mushrooms from the Mondo® Grow Box

When the substrate is fully colonized the fruiting process can be started. It is time to grow mushrooms!
First wash your hands and clean up the work area.

Now get the mushroom substrate box:

  • Open the corner of the lid and fill the grow kit with cold tap water until it’s full.
  • Close the lid and let is soak in a cold place for 9-12 hours. This can be done in the refrigerator
  • After 9-12 hours drain all water out of the kit, by opening the lid a little and poor the water out.
  • Add 150 ml of clean water to the grow bag (filter bag)

Put the prepared substrate in the fruiting bag. This bag forms your grow chamber.

  • Mist the grow chamber to get the humidity up. Always spray against the sides of the fruiting bag, never on the substrate or mushrooms.
  • Close the grow bag by holding the top a few times and fix it with a clip.

Pick a warm and bright spot for the kit. Do not put the grow kit in direct sunlight. Optimal temperature is 23 -27 degrees Celsius. Keep the fruiting chamber moist, by spraying water every 2 (two) days.

The first pins, micro mushrooms, can appear within several days and up to two weeks. Refresh the air 1-3 times a day by opening the grow bag, letting C02 out , and closing the bag with lots of fresh air inside.

Harvest from the MONDO® Grow Box

When the mushrooms are mature harvest them for the collection of the spores or other use

Harvest the mushrooms once the caps of the mushrooms are almost fully open. Pick them with a slight twist, counter clockwise.

Re-hydrate by soaking the kit after the harvest to create a new flush of mushrooms.

Additional Info
Additional Info
Productcode zgk-kk1
Weight (KG) 0.2000
Grow Kit type Without mycelium
Difficulty Moderate
Species No spores included
Origin Netherlands
Potency n / a
Optimum cultivation temperature 20ºC
Yield (from) > 1000 grams
Yield (to) > 1000 gram
Water Spray Needed Yes
Not shipped to: Australia, Canada, New Zealand, Norway, Russia, Switzerland, United Kingdom, United States
Customer Reviews (11)
Good stuff
I have bought a few times with this croud always been happy with the outcome slight problem with the most recent time I experienced green mold for the first time on one of my 2 boxes however I'm not sure if it was my fault or theirs but still they was nice enough to offer a replacement box I would recommend website and also recommend buying a ready formed mycilium kit for less trouble and less time till you see fruit Review by jake (Posted on 2/14/2020)
Very supportive team
I would recommend trying this out, although in my case it didnt worked quite as well as expected. My guess is the spore solution was too weak, or maybe there is an error in the instructions, as I have used 2 ml spore suspension and the mycelium formed in the liquid culture couldnt colonize all substrate. The team was highly supportive though and sent me a replacement in return. I will seek to start up this method again in the near future, using spores from previous mushrooms and see how it works. Review by Psilocin (Posted on 1/18/2020)
Takes a lot of time
Good grow kit. Instructions are simple but sometimes vague. If you have any questions on anything with this grow kit, then good luck... all forums, as soon as you mention "grow kit" they will refuse to answer your question and say "your grow kit won't work. Do pf tek". A bit childish in my opinion.

But the kits its self took a long time to prepare.. I got it in October, only now (january) i have grown and ate my baby's... if you have time to spare and want a lot of mushys this is the kit for you. If not, I advise a simpler kit (usually takes 4 weeks max for first flush). But I am happy with the product (and so are my friends)

Ps: 3 stars doesn't mean it's bad. Just not perfect
Review by Chris (Posted on 1/11/2019)
Excellent product, really good instructions even for the novice grower, fast shipping. Would recommend and will be buying again.
Thanks m-m-s :)
Review by Psychedelicacy (Posted on 7/23/2018)
Not quite what I expected
There was a problem with supplier - I got 2 times contaminated substrate so then I got a refund.
Anyway the customer support is really honest and always helped me.
So I ended up with one working substrate.
I did everything according to the guide provided and was able to harvest only about 100g of very small 1-3cm fresh mushrooms from one kit and it took too many time about 2 months). So I started to study more on forums also mushroom cultivator book from Paul Staments and found out that mushrooms need way more fresh air exchange than what you get through the micron filters on the bags. I would recommend to make 2 holes to the bag of 3-4cm diameter on both sides above the substrate and tape them with micropore tape (for better fruiting conditions). And spray the bottom of the bag with black paint to height 1-2cm above the substrate to prevent side pinnings because when you pour vermiculite on top of the substrate the mushrooms always grow everywhere else where it is easier for them and you do not want that.
Review by Martin (Posted on 6/10/2018)
Fab Service
Just to let you know, i am a first time grower, The service is absolutely fabulous, received the order 3 days after the money reached them. Product came in unharmed. the kit is pretty efficient. Cant wait for it the fruit. the colonization looks amazing. will be back with more once the kit fruits. will defo be ordering again. Review by Ryan (Posted on 4/13/2016)
Spectacular first flush (& waiting for the next one)
It simply works like magic (even after a long intercontinental flight!). I have grown mushrooms only four or five times, always with good results. Last time, though, it was a complete failure, so I gave growing up growing them. Until I discovered this product, and decided to have a go at it. I don't regret it at all.
Just two recomendations: 1. use it together with Sporemate; 2. read the instructions as many times as you find it necessary to understand all the steps of the process (btw, thank you and congrats to whomever wrote the instructions).
Review by Sobria_Ebritas (Posted on 10/13/2015)
Génial! :D
Envoie très rapide, très satisfaisant pour les cultivateur intermédiaire, un peu moins rapide que les barquette mais l'économie se fait sentir je recommande vivement pour ce qui veulent une récolte plus importante que les barquette! :D Review by Jumido (Posted on 9/21/2015)
Génial! :D
Envoie super rapide et démarrage des barquette super simple et rapide également, je recommande a tout les débutant! Et il y'a une grosse récoltes a la clef ! Review by Jumido (Posted on 9/21/2015)
whaou! order arrived super fast, it's perfect! there's more to ca way! thank you magic!

I enverais colorful photos!;-)

was soon the

Review by loic (Posted on 3/8/2013)
Good and simple
I bought this product in June, and I have to say- I got more than I expected- great quality, easy steps to follow, no green mold, a lot of mushrooms- more than one kilo. It's adventure time! I heartily recommend it Review by Karina (Posted on 12/5/2012)
Write Your Own Review

Only registered users can write reviews. Please, log in or register

You may also be interested in the following products:
Mondo® Grow Kit Starter Pack Mondo® Grow Kit Starter Pack
79 Review(s)
Magic Mushroom Grow Kits Combi Deal - 3 Pack Magic Mushroom Grow Kits Combi Deal - 3 Pack
88 Review(s)

As low as: €92.50

Mondo® 3XL Grow Kits Combi Deal Mondo® 3XL Grow Kits Combi Deal
200 Review(s)

As low as: €119.00

Orissa India spore syringe Orissa India spore syringe
4 Review(s)
Fiji spore syringe Fiji spore syringe
1 Review(s)
Texas spore syringe Texas spore syringe

Regular Price: €14.95

Special Price €9.95