Last updated: March 25, 2026
If you decide to grow your own magic mushrooms, you’ll soon face a choice: which type of grow kit is best for your situation? Two of the most popular options are the FreshMushrooms kits and the XL mycelium kits. Both have their own characteristics, advantages, and challenges. In this article, we’ll thoroughly compare both types so you can make an informed choice.
What makes FreshMushrooms magic mushroom grow kits unique?
FreshMushrooms magic mushroom grow kits are specially designed for people looking for an easy-to-use way to grow magic mushrooms at home. These kits are fully colonized with mycelium and offer a number of interesting benefits.
One of the biggest advantages of the FreshMushrooms kits is that they are 100% colonized with mycelium. This means you don’t have to wait for the mycelium to spread, because that work has already been done for you. This not only shortens the time until your first harvest but also significantly reduces the risk of contamination.
The key features of FreshMushrooms kits
- Fully colonized with mycelium for faster results
- Lower risk of contamination due to pre-colonized substrate
- Easier to use—you don’t have to “drown” the mushrooms
- 1200cc capacity grow bag
- Includes a grow bag with air filters (perforations)
- Multilingual user manual (Dutch/English)
Using these kits is quite simple. Just follow the included instructions, and instead of the traditional “submersion method” where you completely submerge the substrate in water, with these kits you only need to spray a little water into the grow kit regularly to maintain the proper humidity.
The benefits of XL mycelium kits
If you’re looking for a higher yield, the XL mycelium kits might be a better fit for you. These kits offer significantly greater capacity and are ideal for those with a bit more experience or who simply want to harvest more.
Key features of XL mycelium kits
- Larger capacity: 2100cc compared to 1200cc in standard kits
- 80% more substrate than medium kits
- Ability to grow larger mushrooms
- Higher potential yield due to more substrate
- Suitable for those who already have some experience growing mushrooms
The XL mycelium kits work on the same principle as the standard kits, but simply have a larger capacity. The substrate consists of rye and perlite, with a top layer of vermiculite that helps retain moisture. Due to the larger amount of growing medium, these kits can produce impressively large mushrooms, in some cases up to 30 cm tall.
Strains that thrive in XL format
Although nearly all magic mushroom strains grow well in an XL format, there are a few that perform particularly well under these conditions:
- B+ magic mushrooms: Known for their aggressive growth and ability to form massive fruiting bodies
- Golden Teacher: Produces massive fruiting bodies with beautiful golden caps
- McKennaii: A visually striking strain that benefits greatly from the larger growing medium
- Mexican: A classic favorite that becomes even more impressive in XL size
Using an XL mycelium kit does require a bit more attention to the growing conditions. Due to the larger volume, it’s important to closely monitor temperature and humidity for optimal results.
The direct comparison: which kit is right for you?
If you’re deciding between the FreshMushrooms and XL mycelium kits, it’s best to consider your specific needs and experience. Here’s a comparison to help you make your choice:
FreshMushrooms kits are the better choice if:
- You’re starting to grow for the first time and want a straightforward setup
- You want to see results faster
- You’re concerned about potential contamination
- You have limited space for your growing project
- You want a modest harvest for personal use
XL mycelium kits are the better choice if:
- You already have some experience growing magic mushrooms
- You’re aiming for a larger yield
- You’re interested in growing extremely large magic mushrooms
- You’re willing to devote a bit more time and attention to your grow project
- You have enough space for a larger-sized grow kit
Optimal conditions for both grow kits
Regardless of which kit you choose, there are basic principles that apply to both types:
- Temperature: For most species, a temperature between 22 and 26°C is ideal during the growth phase
- Light: Mushrooms need indirect light, but avoid direct sunlight
- Humidity: High humidity is essential; the grow bag helps maintain this
- Hygiene: Always work with clean hands or sterile gloves to prevent contamination
- Patience: Although FreshMushrooms kits yield results faster, every grow kit requires a certain amount of patience
For those serious about their growing project, it may be worth investing in some growing supplies such as a heating mat to keep the temperature constant, or a thermostat for precise temperature control.
Popular Strains and Their Characteristics
Whether you choose a FreshMushrooms or XL mycelium kit, you’ll need to decide which magic mushroom strain you want to grow. Here are some popular options available in both sizes:
Golden Teacher
The Golden Teacher is known for its distinctive golden caps with a diameter of up to five centimeters. It provides a deeper trip than some other strains and is an absolute classic among growers. In XL format, this strain can produce truly monumental fruiting bodies.
B+
The B+ magic mushroom is particularly popular due to its robustness and ability to produce enormous fruiting bodies. Some growers report specimens up to 35 cm tall. B+ grows quickly, is potent, and takes on all sorts of shapes and sizes, making it a favorite for both beginners and experienced growers.
Mexican
Mexican magic mushrooms are among the best-known and best-selling strains, and guarantee reliable harvests. This strain is ideal if you’re looking for a consistent growing experience with good results. In an XL Mycelium Box, the Mexican can produce extremely large mushrooms in surprisingly little time.
Cambodia
This strain was discovered near the famous Angkor Wat temple and is known for its large mushrooms and excellent yield. Cambodia mushrooms quickly colonize the substrate, meaning you’ll see results faster. The XL variant ensures even more impressive growth.
Tips for a successful grow
No matter which kit and strain you choose, here are some tips to maximize your chances of success:
- Start fresh: Both types of kits are fresh products. Set them up immediately upon receipt or store them in the refrigerator for a maximum of one day
- Work Sterile: Use sterile gloves and, if necessary, a face mask while setting up and handling your grow kit
- Maintainconstant conditions: Try to avoid temperature fluctuations; use a heating mat if necessary
- Be patient: Although FreshMushrooms kits yield results faster, every growing process takes time
- Documentation: Keep track of the conditions and results so you can learn from them for future growing projects
The XL kits, in particular, contain more substrate, which means they require slightly more water during spraying to maintain the proper humidity.
Recognizing and preventing contamination
Contamination is the most common reason a cultivation attempt fails. Green, black, or pink spots on the mycelium are signs of fungal infection. Yellow spots or liquid may be a defense mechanism of the mycelium itself (metabolites) and are usually harmless, but keep an eye on them.
Prevention starts with good hygiene: wash your hands thoroughly, work in a dust-free area, and open the cultivation bag as little as possible. FreshMushrooms kits offer an advantage here, as the substrate is fully colonized and less susceptible to invading fungi than partially grown substrate.
If you do notice contamination, remove the kit immediately from the grow room to prevent spread to other grow projects. Dispose of contaminated kits in a sealed plastic bag.
Multiple flushes: how many harvests can you expect?
Both FreshMushrooms and XL kits can produce multiple flushes (harvests). On average, you can expect 2 to 4 flushes per kit, with the first flush typically being the largest. After each harvest, let the kit rest for 5 to 7 days in a slightly cooler environment (18 to 20°C) before you start spraying again.
Due to their larger substrate volume, XL kits perform relatively better in later flushes: there is simply more food available for the mycelium, so the third or fourth flush does not decline as sharply in yield as with smaller kits.
Harm reduction: safe use of home-grown magic mushrooms (18+)
Psilocybin mushrooms are powerful psychedelics. Responsible use requires preparation. Keep the following guidelines in mind:
- Set and setting: Your state of mind and environment greatly influence the experience. Use only if you feel well and are in a familiar environment
- Dosage: Dried magic mushrooms are 10 times stronger than fresh ones. A low dose starts at 1 gram of dried mushrooms; an average dose is between 1.5 and 3 grams. Never exceed this without proper preparation
- Trip sitter: With higher doses, make sure a level-headed and trusted person is nearby
- Avoid combinations: Do not combine psilocybin with alcohol, stimulants, or antidepressants (especially SSRIs and MAO inhibitors)
- Medical contraindications: Use is not recommended for those with mental health conditions, a family history of psychosis, or during pregnancy
- Age restriction: Magic mushrooms are exclusively for individuals 18 years of age and older
More detailed information on safe use can be found at kennisbank.dutch-smart.nl.
Alternative growing options: Funglandia and Royale Flush
In addition to FreshMushrooms and XL kits, Dutch-Smart also offers other grow kits. The Funglandia grow kits are an excellent alternative for those looking for something different from the standard brands. The Royale Flush magic mushroom grow kits are also popular and offer a slightly different method. Those who also want to explore how truffles compare to mushrooms will find an interesting point of comparison in the sclerotia and truffle category, as truffles are legally permitted and contain the same active ingredient, psilocybin.
Who are these grow kits suitable for?
Growing magic mushrooms is an interesting hobby that offers insight into the realm of fungi. The grow kits are suitable for various groups of people:
- Curious beginners: FreshMushrooms kits are ideal for those who want to grow mushrooms for the first time
- Experienced mycology enthusiasts: XL kits offer extra possibilities for those who want to dive deeper into the hobby
- People who want control over their experience: By growing your own, you know exactly what you’re using
- Nature lovers: The process from mycelium to mushroom is an educational lesson in biological cycles
Growing magic mushrooms can be a rewarding hobby that not only provides you with a harvest but also a deeper understanding of biological processes.
Frequently asked questions about magic mushroom grow kits
How long does it take for the first magic mushrooms to appear?
With FreshMushrooms kits, you’ll usually see the first pins appear within 1 to 2 weeks, because the mycelium has already fully colonized the substrate. With XL kits, this may take a little longer due to the larger substrate volume. The total time from setup to harvest averages between 2 and 4 weeks for both kits.
Can I store a grow kit if I don’t want to use it right away?
Yes, but only for a short time. Store an unused grow kit for a maximum of 3 to 4 weeks in the refrigerator at 2 to 8°C. Storing it longer increases the risk of contamination and reduces the vitality of the mycelium. Set up the kit as soon as possible after receiving it for the best results.
What is the difference between psilocybin in magic mushrooms and in truffles?
Chemically speaking, there is no difference: both magic truffles and psilocybin mushrooms contain the same active compounds, namely psilocybin and psilocin. The difference lies in their biological form. Truffles are underground sclerotia (storage organs), while magic mushrooms are fruiting bodies. In terms of effect, they are comparable, though the concentration varies by species and batch. Magic truffles are legally available in the Netherlands, while mushrooms are not; however, growing mushrooms for personal use currently falls into a legal gray area.
Which grow kit yields the highest harvest?
Due to their larger substrate volume, the XL kits (2100cc) typically produce a higher total yield than the standard FreshMushrooms kits (1200cc). An XL kit can yield up to 300 grams of fresh magic mushrooms over multiple flushes, depending on the strain and conditions. However, this is not a guarantee and depends heavily on how precisely you control the growing conditions.
