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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

Availability: In stock

Multi Banco
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
  • 1x reusable yellow seal – 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 reusable yellow seal 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 reusable yellow seal. 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 reusable yellow seal.


    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
    Mushroom Strain McKennaii
    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

    Customer Reviews

    Items 1 to 20 of 57 total

    per page
    1. 1
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    Super Service Review by J
    It was the second time ordering after the first amazing trial of the combo deal of Golden Teacher, B+ and McKennaii.
    The shop was super friendly in changing the order after our hearts sunk a bit with shipping.
    Unfortunately, our order must have been thrown around wildly while transporting, thus arriving all broken (packaging and plastic box). But we were immediately compensated with another box. So thank you again for being super kind and furthermore taking the time to give advice on additional success with the kit (:

    All in all will absolutely be happy to order again. (Posted on 2/14/2024)
    Best Review by Aron
    I bought this and received within days. I must sqy these are the strongest and nost potent mushrooms I ever ate. It is super deep and colourful. Not for easy journeys ;) (Posted on 12/14/2023)
    Miki Review by Matjaž
    I received the package in three days after I transferred the money via money order. I waited a long time, I thought I messed up already... I put 150 ml of water in the bag as suggested for this kit... I thought that there is too much moisture, I almost gave up, but after a month the mushrooms grew, I harvested them, the first time, then the second time, in the third round, I was only one day late and they sprinkled debris on my base (be very careful here). ..later nothing more, black base, I buy more Golden Teachers.
    The trip itself with approx. 4g of sponges was something between LSD and DMT, in short, a great 6 hours, a very strong experience of infinity and angelic beings!!! I recommend online shopping and consumption of only these sponges 100%...Of course, with caution, if you already have experience beyond this earthly perception!!!
    m. (Posted on 11/21/2023)
    All ok great Review by Francesco
    First time I bought it. It’s ok ✅ super product (Posted on 3/16/2023)
    Good Review by nima
    Good kit but low product (Posted on 2/12/2023)
    Easy grow kit. Works well. Review by Peter
    Keeping these kits at the recommended high temperature with heating from below doesn't work well for me. Mushrooms failed to develop or were disfigured (as on the illustration above). So I grow them cooler, around 20C room temperature without additional heating. The mushrooms are produced slower, 1-3 at a time, and they are robust and well shaped. This particular strain turns dark blue instantly when injured, which is a sign of high potency. I'm very impressed with McKennai. Highly recommend. (Posted on 2/11/2023)
    I had better results with the amazonian kit Review by Nichita
    Sorry for the not so great review but honestly I had better results with the amazonian than with this. I have had poor yields compared to expectations. Probably like 100g fresh at the first one and a little bit less at the second one. When with the amazonian kit I had yields over 200 grams every time. I don't know what the reason is.. An about the effects.. I had good mood and good visuals.. Also not as strong as the amazonian. I hope my review will help somehow.. God bless you all! (Posted on 1/27/2023)
    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)

    Items 1 to 20 of 57 total

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    Important information about Mondo® Grow Kit McKennaii XL

    • The purchase of this product is restricted to individuals who are at least 18 years old.
    • By initiating a purchase, you confirm knowledge of and compliance with the legal terms regarding the product(s) in your country of residence, as well as your eligibility to acquire and hold them.
    • Shipping restrictions apply to this product. Refer to Additional Info to discover our non-delivery zones.
    • Engaging in the consumption of magic mushrooms is solely your responsibility, so be certain to thoroughly educate yourself about their usage and consequential effects.
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