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Easy to grow magic mushroom cultivation kits

Magic Mushroom Grow Kit McKennaii XL by Mondo®

McKennaii magic mushroom xl box is the perfect grow kit to up your game. The McKennaii mushrooms spores are a strange strain of the psilocybe cubensis. It's origin is unknow but the name is definitely a tribute to honor the psychonaut Terence McKenna. The McKennaii mushrooms grow in crazy shapes and sizes and can change every flush

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Availability: In stock on Dec 14, 2022

Product Description

Years of planning and testing has resulted in the next generation of Mondo® McKennaii XL magic mushroom grow kits. The  McKennaii XL grow kit is now even better than it ever was. Compared to the first generation of Mondo®XL magic mushroom grow kit, the next generation is improved with:

  • Larger yields, more mushrooms
  • More flushes*
  • Better resistance against contaminations
  • Different, but easier instructions


*some strains produce more flushes than others. The first three flushes are the largest.

Meet the new standard of easy grow kits

The Mondo® McKennaii XL magic mushroom grow kit is slightly different than the grow kits you may have used before. These are mainly 'under the hood' differences and are not easily seen.

Just like the previous and other easy mushoom grow kits, you do not need to use additional spores. During the laboratory process, the spores have developed in mycelium inside the substrate (the cake) in the grow box.

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 grow kit in the refrigerator (2°C to 8°C) for 2 weeks after productiondate. First, wrap the grow kit in a plastic shopping bag and close it well.


  • 1x grow box – This contains substrate with active mycelium (the cake)
  • 1x large grow bag – The bag has micron filters to keep contaminants out
  • 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 to use


    How to prepare the room and yourself before you begin

    • Close any open windows. Wind or draft may bring microorganisms that can contaminate the Mondo® 'McKennaii' XL 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 Mondo® McKennaii XL 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.

    Instructions Mckennaii XL Magic Mushroom grow kit

    1. Fill the grow box with fresh, potable water. UNtill the susbtrae is submerged. Close the grow box well and let is soak for 12 hours.
    2. After 12 hours, pour the water out of the grow box.
    3. Place the grow box inside the large grow bag. The open end of the bag should point upwards.
    4. Remove the lid from the grow box. Rinse the lid, and store it in the ziplock bag for later use. Place the ziplockbag with the lid back in the carton box.
    5. Fold the open end of large grow bag twice; do not cover the micron filter.
    6. Place the paperclip on the fold, so the bag stays closed. Now the Mondo® 'McKennaii' XL Magic Mushroom grow kit is ready to grow.
    7. Place the Mondo®'McKennaii XL Magic Mushroom grow kit inside the carton box, on top of the ziplock with lid.



    The ideal temperature is 24°C. Do not have the temperature drop under 18°C and not exceed 29°C. To keep the temperature from dropping under the 18°C, you can use a thermo mat to maintain the ideal temperature. A thermo mat  is a must-have in the winter or colder regions of the world.


    The Mondo® 'McKennaii' XL 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

    The day after you start the process you begin with misting. Open the grow bag by removing the paperclip. 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. Misting also vents fresh oxygen inside the bag. 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 16 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. Remove the mushrooms from the cake by taking hold of the base of the mushroom between thumb and index finger. Rotating your hand clockwise slowly, until the mushroom lets go. Do not pull out the mushrooms. This would risk damaging the mycelium and killing it. 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 large grow bag. Fill the box with fresh, potable water. Take the lid out of the ziplock bag 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 grow bag with micronfilter upside down to dry. Make sure to hang it upside down, so no micro organisms will access the bag. Many growers prefer to use new and unused grow bags after every flush.

    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 3 – 7 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 or 3 flushes out of a Mondo® 'McKennaii' XL Magic mushroom grow kit. If you are experienced in cultivating, you can get more flushes out of a kit.

    The end

    When no more mushrooms grow out of a grow kit after the second flush for at least three weeks, or when the Mondo® 'McKennaii' XL 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 Mondo® 'McKennaii' XL 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 MCS.GKMYC.002-MCKE-2100
    Weight (KG) 1.4000
    On Sale? No
    Alternative product: No
    Grow Kit type Mondo
    Difficulty Moderate
    Size Extra Large
    Species Psilocybe cubensis
    Origin Unknown
    Potency High
    Optimum cultivation temperature 23ºC
    Yield (from) 100 grams
    Yield (to) 400 gram
    Water Spray Needed Yes
    Not shipped to: Non EU countries, Africa, Asia, Australia, Caribbean, Central America, Cyprus, Denmark, Iran, Ireland, Middle East, South America, Canada, Estonia, Finland, Israel , New Zealand, Norway, Russia, Sweden, Switzerland, Turkey, United Kingdom, United States

    Customer Reviews

    Items 1 to 20 of 50 total

    per page
    1. 1
    2. 2
    3. 3
    Great Review by David
    Nice kit, good yield, amazing customer service. Please stock more soon ????

    @@Edit by MMS: We added some more XL Kits! Have a look at the Mondo XL and GetMagic XL (Posted on 11/23/2022)
    great Review by mark
    Great service and advice on growing. Thanks. (Posted on 11/23/2022)
    Excellent kit, excellent service Review by Tamás
    It was a bit slow start, but first flush turned out nice, great yield and my new favorite strain. (Posted on 10/21/2022)
    i am apriciated. Review by janos
    I got this as a replacement. It worked well. Customer service is very good as well i can recommend this shop.
    (Posted on 9/21/2022)
    Great support Review by Marius
    I had a little problem with the kit and the support team was very kind and sent me a replacement and everything is working very good now. Thank you!
    And I tried this strain before, on my first experience ever actually.. I recommend them=) (Posted on 9/8/2022)
    Prfect Review by nik
    6 flushes gave me 190g dry (Posted on 8/20/2022)
    Nice Review by Pepe
    So, this is my second order. First time i've ordered Mazatapec, but they didn't grow. So I tried McKennaii...
    Everything's working fine and I'am going for the 4th flush. Hopefully it will come. (Posted on 7/28/2022)
    best of the best Review by Marek
    5th flush and still going (Posted on 7/14/2022)
    Let's see Review by Pepe
    First time I've ordered Mazatapec XL box, but the mushrooms didn't grow. Support team gave me an advice, but it didn't help.

    So I tried this one. First flush harvested. Mushrooms are looking pretty good. Now I hope for another flushes.
    Great service, fast delivery.
    (Posted on 7/9/2022)
    Rookie Review by Cristian
    It’s the first kit I’ve gotten and the first flush was rich, it worked great!
    I just followed the instructions and it worked splendid!
    Thank you (Posted on 5/26/2022)
    Hard to say Review by Bartek
    It didn't work for the first time, but they sent me another one and it was much better. (Posted on 5/19/2022)
    So so ;) Review by Bartek
    I had two tries - one didn't work, but they sent me another one for free and it was much better.
    Generally - I really like this shop for the good service :)

    (Posted on 5/19/2022)
    Great yield & great support Review by Philip
    It was my second order here. I was unlucky with my first box, because it got mold. But no problem because of the amazing support of this shop. I got a new box without problem and was asked if the other ones are fine or also need a replacement. Now I have the replacement box active since some time and what can I say: such an amazing yield! I totally can recommend a heat mat though, which makes a huge difference! I just tried this type of shrooms once but they seem very nice. Will go with a stronger dose soon.
    All in all very happy, also with the great customer support, will order my shrooms always here. (Posted on 5/12/2022)
    Great flushes Review by Jacob Tandberg
    This grow kit got me 4 flushes and a total of 65 gram dried. I had to wait for the first flush and got a little worried, but when it came after about 20 days it was huge. (Posted on 4/21/2022)
    Nice product Review by G
    This kit and this strain are my favorite, i've had an issue with the second kit but the support is very helpfull and friendly !

    I recommend this kit 100%, just follow the instruction carefully you will be happy with the result (Posted on 3/30/2022)
    I screwed it up Review by Aido
    I got the Grow Kit but I had also got some from another supplier who had sent instructions with the kit, so I assumed that they were the same. Without getting into detail I basically did not do it correctly and got zero crops...! A real pity as I was really looking forward to trying these out.
    The other ones that I got were super easy to follow, didn't even have to add water for the first flush which was great... and I got 3 to 6 flushes from them. (Posted on 11/24/2021)
    Good experience Review by Aleks
    The McKennaii mushrooms have a very good potency. This grow kit produced a good amount of mushies, which I am happy about, since the 1st one I ordered did worse than expected. Will order again and recommend. (Posted on 11/11/2021)
    Good kit!! Review by eero
    Ford flush Approx. 4 weeks 350g fresh.. second flush on itse way.. looking to increase yield from flush nr.1 (Posted on 10/10/2021)
    quality and shipping the best Review by Angelo
    Every time happy to grow with magic mushrooms shop (Posted on 9/5/2021)
    Fertile! Review by Tony
    Took longer for the first pins to pop up than the smaller kit but the yield was great! Second flush started to show pins after only one day tho and the yield looks to be bigger already! I am fairly certain there will be at least a third flush. I recommend! (Posted on 8/31/2021)

    Items 1 to 20 of 50 total

    per page
    1. 1
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    Important information about Mondo® Grow Kit McKennaii XL

    • 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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