B+ Mushrooms: Psilocybin that’s Not a Quite a Perfect Score, Yet Never a Fail
Last reviewed and updated: June 23, 2026.
Key Takeaways
| Potency | ~0.5–0.75% psilocybin dry weight — average for cubensis; standard dosing guidelines apply; significantly less potent than Penis Envy or P. azurescens |
| Standard doses (cubensis) | Low: 1–1.5g · Moderate: 2–2.5g · High: 3.5g+ |
| Cultivation | Forgiving temperature/humidity range, contamination-resistant, multiple flushes, large fruiting bodies — frequently recommended for beginners |
| Legal to grow | Colorado (Prop 122, adults 21+) only in U.S. — illegal in all other states; spores legal for microscopy most states (not CA/GA/ID) |
| Experience | Warm, euphoric, visually rich; emotional openness; fewer anxiety reports than some strains |
A B-plus grade on your report card is one you’re happy to show your grandma. A B-plus is good enough all around. Sure, an A+ would’ve been nice. The Harvard admissions office might want an A+. But anyone complaining about a B+ needs to chill. We don’t have to be overachievers all the time.
I’ve grown B+ mushrooms for years. They are a strain of the popular psilocybe cubensis magic mushrooms. As the name suggests, extremely solid. Dependable. Easy to grow. The grows, and the trips, are rarely a complete failure.
A Cube is Not a Cube: A Personal Take
I tend to listen to the growers who know mushrooms best. What they often tell me is that the differences between strains have a lot to do with how they’re grown. A mushroom grown with attention, care and reverence will feel different than one grown carelessly in a dark lonely room. Mushrooms, these experts remind us, are more like animals than plants. If you raised a puppy with love and attention, you might end up with a loving and affectionate dog. Same goes for mushrooms.
B+ = B-Positive Trips
Many people pronounce the name of the strain as Be Positive. Why? Because the experience of tripping on B+ mushrooms is, often, a pretty happy one.
People tend to get done eating B+ mushrooms and think: yeah, that was pretty darn good. The trip didn’t necessarily astound me. I’m not a changed person–in a good way or a bad way. All around, a pretty positive time.
B+ Are Becoming More Popular to Grow
I learned about B+ mushrooms from a friend, an expert grower. He said he only grew B+. At the time, I was growing a half-dozen different strains of psilocybe cubensis–on the theory that I like variety. Other mushrooms are more potent or more colorful or have more personality in the way they look.
But my friend said there wasn’t any need to grow a bunch of different strains. Just find one that’s pretty good and stick with it, he said. After that, I grew more B+’s. I’ve found B+ mushrooms to be just as advertised: a consistent, reliable, tried-and-true strain.
When grown, B+ mushrooms are beginner-friendly. They tend to colonize the substrate quickly and reliably. They aren’t super liable to be contaminated by mold. The fruits — the mushrooms — are usually big and thick. And the flushes — the actual sprouting of the mushrooms — happens a few times, not just once.
To grow B+ mushrooms, follow the steps for growing other types of psilocybe cubensis.
B+ Mushrooms are of Average Potency
One thing is clear: B+ mushrooms don’t contain the most psilocybin of any strain. That distinction tends to go to the strain sometimes called Penis Envy (although Penis Envies are being re-branded with other names, like Shiva Lingam, as we speak).
RELATED: Penis Envy Mushrooms: The Strongest Magic Mushroom with the Funniest Name
Testing is only just beginning for magic mushrooms, to show users how much psilocybin is in any one strain. One of the few pieces of data come from Oakland Hyphae, which puts on the Hyphae Cup. Oakland Hyphae and their partners, Tryptomics, test strains that growers submit. In a recent cup, a strain of B+ was found to have about an average level of psilocybin, compared to other strains.
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Dosing B+ Mushrooms
That finding from Hyphae Labs tracks with what normal people are saying: B+ mushrooms are about average in their potency.
If you’re using B+, you can follow the dosage recommendations passed down by users around the Internet. For example:
- A tenth of a gram of B+ is likely to be a microdose.
- A half a gram is a mini-dose.
- A full gram is a “museum” dose.
- Two grams is a comfortable journey dose, but you probably want to be somewhere safe, with access to an outdoor space and someone around to watch over you.
- 3.5 grams is a “therapeutic” dose, for which you’ll likely want a sitter, guide or caregiver nearby.
- 5 grams and above is a “heroic” dose, for which you definitely want safety and support.
RELATED: Shrooms Dosage: Chart, Calculator & How-To Guide
A caveat: psilocybin potency varies a lot depending on many factors: growing conditions, genetics, whether the mushrooms came from an early flush, or bloom, or a later one. Without testing your mushrooms in a lab, you can’t be certain how much psilocybin you’re taking in any gram of B+.
See also: — our psilocybin retreats guide.
B+ Mushrooms in 2025: Potency, Why They’re So Popular, and the Legal Context
B+ (B Plus) is one of the most cultivated and widely used Psilocybe cubensis strains — partly for its consistent performance characteristics, partly for its forgiving grow profile. Here is the current context on potency, cultivation, and legal status.
Potency: where B+ sits in the cubensis spectrum. B+ is consistently described as a mid-potency cubensis strain. Analytical testing by organizations like Miraculix and data from amateur cultivators suggests B+ typically produces psilocybin content in the range of 0.5–0.75% dry weight — solidly average for cubensis, which itself ranges from roughly 0.3% to over 2% depending on strain and growing conditions. This positions B+ as a predictable, approachable strain: not so weak as to require large quantities, not so potent as to produce dramatically variable experiences between batches. For people new to psilocybin mushrooms or looking for a reliable baseline, this predictability has significant practical value. Compare to high-potency strains like Penis Envy (typically 1.5–2.5%) or P. azurescens (1.78%+) — B+’s moderate potency means standard dose guidelines for cubensis apply without the significant downward adjustment those strains require.
Why B+ is so popular: the cultivation advantage. Beyond potency, B+ is valued for characteristics that make it unusually forgiving for home cultivation. It tolerates a wider range of temperatures and humidity conditions than many cubensis strains, is relatively resistant to contamination, and produces large, dense fruiting bodies. It also tends to produce multiple flushes reliably. For home cultivators in Colorado (where Proposition 122 legalized home cultivation for adults 21+) or others working with legally available materials, B+ is frequently recommended as a strain that rewards beginners while satisfying experienced growers. Its large fruiting bodies mean it’s visually distinctive and easy to work with for drying and storage.
Legal status and the Colorado home cultivation context. Psilocybin mushrooms including B+ cubensis are a Schedule I controlled substance in the United States federally and in all states except Colorado. Colorado’s Proposition 122 (passed November 2022) legalized personal possession and home cultivation of psilocybin mushrooms for adults 21+, meaning B+ can be legally grown at home in Colorado. Oregon’s Measure 109 established a licensed service center model for psilocybin — it does not permit home cultivation. All other states: cultivation is illegal regardless of personal use intent. Psilocybin spores (which contain no psilocybin) are legal to purchase in most states for microscopy purposes, with exceptions in California, Georgia, and Idaho.
Frequently Asked Questions
How potent are B+ mushrooms?
B+ mushrooms are mid-range in potency for Psilocybe cubensis. Analytical testing suggests typical psilocybin content of 0.5–0.75% dry weight — average for cubensis. This means standard psilocybin dosing guidelines for cubensis apply to B+: a low dose is 1–1.5g dried, a moderate dose is 2–2.5g, a high dose is 3.5g+. B+ is neither the weakest cubensis strain nor among the most potent — it sits solidly in the middle, which contributes to its predictability and popularity. Compare to Penis Envy (roughly 1.5–2.5% psilocybin), where standard cubensis doses would be dramatically stronger. If you’re moving from B+ to a higher-potency strain, start at a lower weight than you’re accustomed to.
Are B+ mushrooms good for beginners?
B+ is frequently recommended for people new to psilocybin mushrooms. Several characteristics make it well-suited to beginners: mid-range, predictable potency that doesn’t require complex dose adjustments; reportedly smooth and manageable experience character (often described as warm, visual, and emotionally open without the overwhelming intensity of high-potency strains); clear, informative trip reports and community data available; easy and widely documented cultivation profile for those in jurisdictions where cultivation is legal. That said, “beginner-friendly” still means the full range of psilocybin effects applies — set, setting, dose accuracy, and having a trusted person present for higher doses all matter regardless of strain.
Is it legal to grow B+ mushrooms?
In Colorado (under Proposition 122), yes — adults 21+ can legally cultivate psilocybin mushrooms including B+ cubensis for personal use at home. In all other U.S. states, cultivation is illegal — psilocybin is a Schedule I substance and legal risk begins when mycelium starts producing psilocybin. Oregon permits psilocybin only through licensed service centers; home cultivation is not permitted. Spores (which contain no psilocybin) are legal to purchase in most states for microscopy, with exceptions in California, Georgia, and Idaho. Outside the U.S.: the Netherlands permits psilocybin truffles through a legal gray area (not mushrooms). Jamaica, Samoa, and the British Virgin Islands have legal or unscheduled status for psilocybin mushrooms.
What does a B+ mushroom trip feel like?
B+ is consistently described as producing a warm, euphoric, and visually rich experience — often characterized as one of the more pleasant cubensis strains. Common themes in experience reports: enhanced appreciation of nature and beauty; moderate visual effects (patterns, color enhancement, light trails) at standard doses; emotional openness and introspection; feelings of connectedness. At lower doses (1–1.5g), the experience is mild and perceptual with minimal cognitive disruption. At moderate doses (2–2.5g), visual effects and introspection become more prominent. At higher doses (3.5g+), the experience becomes a full psychedelic with ego dissolution potential. B+’s experience profile has fewer reports of anxiety or difficult experiences compared to some other strains, though individual variation in set, setting, and dose remains the primary determinant of experience quality.
