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Magic Mushroom Grow Kit B+ XP by FreshMushrooms®

The B+ magic mushroom is a strong and easy-to-grow Psilocybe cubensis strain. B+ Magic mushrooms are a good choice for beginners and regular growers. The FreshMushrooms® B+ grow kit is very low in maintenance. The XP stands for Extra Potency!

Availability: In stock

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Product Description

Growing with the B+ XP Fresh Mushrooms Grow Kits is extremely easy. These kits are completely maintenance-free thanks to a fully colonized substrate without fillers. You hardly have to do anything to get your first flush with high levels of psilocin. Follow the instructions below and you will be assured a high harvest of mushrooms!

  • Fast growing: 1 week to first pins
  • High yields: Up to 4 flushes. (in ideal conditions)
  • High Potency: According the supplier the XP (Extra Potent) strains are twice as potent!

Contents of B+ XP Mushroom Grow Kit

  • 1x B+ Mushrooms Grow box – This contains rye substrate with active mycelium
  • 1x Growbag – The bag has filters across the bag.
  • 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 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 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: Starting the B+ Magic Mushroom grow kit

  1. Take the magic mushroom grow kit, plastic bag and paperclip out of the box. Remove the lid of the mushroom grow kit (store the lid properly). Rinse the lid under running water. You will need it again later (step 7).
  2. Place the mushroom grow kit without lid in the plastic grow bag (opening at the top). Slide the opening of the bag under the bottom with the micro perforation pointing upwards. The opening of the bag is now largely closed. You do not have to worry about air circulation.
  3. When you see the first small mushrooms ( called pins), you can put the grow bag upright. Do not water! The first magic mushrooms will be visible after about 1 week.
  4. Place the mushroom grow kit in an area with enough daylight and at a temperature between 18 °C and 28 °C. NEVER place the grow kit in direct sunlight. Although mushrooms will grow at almost any temperature above 15 °C, 23 °C is the ideal temperature for an optimal harvest. Special heat mats are available to ensure this temperature and not have to heat the entire room.
  5. When the mushrooms are slightly bigger as the pins keep the bag a bit open the entire time so the moisture can evaporate (Phase 2). Too much moisture is not good.
  6. The first mushrooms will be visible after approximately 1 week. Your first harvest will be about a week later. Make sure that you harvest before the first spores begin to fall! Freshmushrooms grow kits produce their first harvest fairly quickly. The first buds are already visible after only 1 week. Low and high temperatures may slightly delay this growth process. It usually takes one to two weeks before the mushrooms are fully developed.

  7. These kits can produce several mushroom harvests. To do so, fill the kit with clean tap water after the first harvest. This process is known as cold shock. It breathes new life into the mycelium and ensures that enough moisture is present for the mushrooms to grow.
  8. Place the lid of the grow Kit back on the kit. Let the kit rest for 12 hours. Open a corner of the lid and drain the excess water. From here you can follow the instructions from step 1 again. This process can be repeated several times.

Growing with a heatingmat (use only for this brand)

Place the plastic bag with the Grow Kit in it on the heat mat. Switch the heat mat on. After two days switch the heat mat off and wait until the buds have developed, which usually takes between five and ten days. Then switch the heat mat on again and open the top of the bag a little so the moisture can evaporate.

What to do if the buds haven’t developed after ten days. Take the cake out of the plastic box, put it back in the plastic box on its side and start again with two days with the heat mat.

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 themagic mushroom grow kit inside a Soaking Bag in the refrigerator (2°C to 8°C) for 4 weeks after the production date.


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 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.


If the conditions are optimal, you can expect the first small mushrooms (the pins) to appear between 7 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.

The end

When no more mushrooms grow out of a grow kit after the second flush for at least three weeks, or when the 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 Psilocybe cubensis 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.003-BPLU-1200
Weight (KG) 1.1000
Mushroom Strain B+
Grow Kit type FreshMushrooms
Difficulty Easy
Size Normal
Species Psilocybe cubensis
Origin Unknown
Potency Average / High
Optimum cultivation temperature 24ºC
Yield (from) 100 grams
Yield (to) 300 gram
Water Spray Needed Yes

Customer Reviews

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Einfach und gut. Review by consti
Top Qualität.
Klappt immer.
Schneller Service.
Jederzeit wieder. (Posted on 6/13/2024)
A bit short Review by Barry
My first grow was done as normal, but all but 2 shrooms grew up from the sides. When harvested, there were some even grown from the bottom. The container was not exposed to excess light, it was even shielded with aluminum foil around the container. Second grow has not produced any starts yet, after 8 days. (Posted on 5/30/2024)
First I was afraid... Review by Tomislav
But everything turns OK. Yes, the temperature is low so it needed more time to start growing but now is going well. I did not harvest and try it yet. In few days I think. Then I will write about my impressions. (Posted on 2/14/2024)
Most Excellent In All Ways Review by jere
Being a "first timer", I was a bit nervous about doing things right and sent a numer of questions to Frank at customer service. He was always exceptionally polite, prompt and most helpful. I have already ordered a second kit with the confidence knowing that I have the folks at Magic Mushrooms watching my back. By reading the reviews, I see they also stand behind the products they sell. One couldn't ask for more.
Thanks y'all for everything!********** (Posted on 1/13/2023)
Fantastic mushrooms Review by AIDAN
This was my first B+ kit and I wasn't disappointed. I'm on my third flush and with almost no effort. I'm a happy customer. (Posted on 11/4/2022)
Good product Review by Plutarch
The shrooms are good in quality and potency. What i miss is the size and yeld of an xl kit. (Posted on 11/3/2022)
Did not grow well Review by Maria
Mushrooms are fine, but unfortunately, did not obtain much from the kit.

~@@ Edit by MMS Support: Please conact the support, maybe we can can help you with the kit! (Posted on 6/8/2022)
Perfect for beginners, easy for experienced growers Review by O Gelissen
This Growkit is a absolute joy to have, it's very easy for beginners and in the hands of a experienced person a very good way of harvesting alot of mushrooms fast and with ease. (Posted on 5/11/2022)
Decent Review by Labaton
First flush stopped growing and all the pins started to darken, i dotn know if the humidity or air or heat is at fault, second flush growing right now. (Posted on 4/18/2022)
Excellent Mushrooms but poor instructions Review by Stéphane
The instructions don't specify that you have to soak the mycelium in water before the first fruiting. Thus I didn't and nothing happened. I soaked the mycelium after 2 weeks because nothing was happening and then they start to grow.
BUT, the mushrooms are really good and the first fruiting was good instead of the messy start. (Posted on 1/7/2022)
Works as described Review by Starter
happy with the results, they grew fast between 6-9 days for each of the 4 yields, sizes varied between 5-15 cms. First ones yielded more, but still a good total amount.
the potency on the smaller ones is mild, for me 3-5 did the trick, but then again it's not something you can control.
pro tip: highly recommend a thai massage while on these (Posted on 12/15/2021)
Great one Review by Kornel
I ordered a Mondo-kit at first but it didnt work (probably my fault as a starter in the grow-kit thing). The guys have offered a replacement and I have chosen a Freshmushroom B+ kit. I got arround 20g dried mushroom out of it. Realy easy to grow as it doesnt need any maintenance (Posted on 8/16/2021)
Very nice and easy! Review by Fulvio
The kit is really easy to use! You don't have to do much really, just make sure you clean the place really well and keep a temperature around 20 c°. You'll get around 20g dry, at least that what I got.
Only complaint is maybe that I'd like it to be a bit bigger (Posted on 5/27/2021)
Potent and pleasent Review by Nick
I quite enjoyed my experiences with these little friends. And there's a reason I call them friends, because they fell less like a plant/fungi and more like a concious being. I even play music for them while theyre growing and they seem to like it as I've never had a single hiccup so far. One time my scale broke so I had to eyeball my dose and it was a bit overwhelming at first but after a few minutes I got a strong sense of euphoria, well-being and at one point I was literally seeing a black and white waterfall of geometry. Like that Warcraft 3 unit used to say "I can see my ancestors" and, boy did I. I got some valuable lessons from that trip. Bottom line is product is amazing and very potent and I've even used it to microdose once or twice which put me in a wonderfull mood for the whole day. Also I have SIGNIFICANTLY lowered my benzo and opiate use since I started growing. In fact I tapered down the codeine and it's been 3 days since my last dose. Even got myself a new job. Treat them more like beneficial medicine and they will help you in turn. They just happen to have the added bonus of being fun too :). Happy tripping (Posted on 3/13/2021)
Excellent service Review by Nicholas
Ordered 2 B+ kits plus some dragon truffles. For whatever reason they only gave me 1 kit + the dragons. After a few quick emails they decided to send me the other free of charge. Managed to get 3 flushes from the first (waiting on the 4th) and 1 so far from the other (waiting for the 2nd flush). Truffles weren't bad either tho I prefer regular shrooms. Also, these little mofos are resilient as f*ck. I had knee surgery shortly after the 1st flush so my room was basically a mess because I had a hard time cleaning. Still, I got better results then expected. I am sure if I had more experience and could move around freely I would have gotten even better results. If you're still on the fence, then don't even think about it. Order now, you won't be dissapointed. (Posted on 2/20/2021)
Excellent service Review by Nicholas of The Dawn
Order 2 B+ growkits. plus some magic truffles (dragons). For whatever reason they only sent me 1 of the growkits but after a few emails they decided to give me the next one free of charge. My first one is on it's fourth flush. 2nd one seemed to be a lot more potent but I am still waiting for the 2nd harvest. Truffles weren't bad either. Overall I am quite happy with the service and even with my miniscule experience I still managed to get a decent amount of shrooms. Not to mention these little fuckers are resilient as f*ck as I had knee surgery shortly after the 1st flush and despite my room being a mess they STILL managed to grow strong. I am sure if I had more experience and I didn't need to walk on crutches I would have gotten even better results. Will definately come back at some point, perhaps try a different strain.If you're still on the fence - don't be, order them now, you won't regret it :) (Posted on 2/20/2021)
Great experience Review by Shahmen
The product worked great but I encountered some problems due to the lack of experience with growing. But that was my fault so the product remains a 5/5 for me (Posted on 12/7/2020)
Easy to grow Review by Kristóf
Easy to grow. Effect are great for beginners. (Posted on 8/5/2020)
Very good Review by Daniela
The first flush took a while but gave plenty of shrooms (18g), the second (9g) and third (5g) ones were very fast but gave slightly less results. I'm now waiting too see if the forth still produções something or not. (Posted on 7/11/2020)
Solid product and great service Review by Drwg
So far we've had about 5 harvests (200g fresh total). This was my first time ordering a kit and had a lot of questions about the finer points. They were able to quickly and clearly answer my questions. I've already recommended to friends. (Posted on 6/18/2020)

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Important information about FreshMushrooms® grow kit B+

  • 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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