B+ (B Positive) | Classic P. cubensis Workhorse Genetics
A cornerstone lineage prized for recognizable morphology and broad study value.
B+ (often written “B Plus” or “B+”) is one of the most widely circulated Psilocybe cubensis varieties in modern mycology circles. It’s commonly described as a “workhorse” lineage—valued for its reliably recognizable cube morphology, frequent reports of large fruiting bodies, and consistent spore characteristics used for microscopy, taxonomy training, and comparative genetic observation.
Genetic Lineage & Historical Context
- Species: Psilocybe cubensis
- Lineage status: Classic, widely distributed cubensis variety (non-albino, non-hybrid designation in common vendor taxonomy)
- Era of circulation: Commonly reported to have gained traction in the 1990s–early 2000s (exact origin remains debated)
- Origin stories (reported): Frequently associated with Florida (USA) in online and vendor histories; other accounts place early distribution through Europe/Netherlands kits or broader pan-tropical sourcing (claims vary)
Because “strain” names in P. cubensis are largely community/vender designations rather than formal taxonomic ranks, B+ should be treated as a widely recognized named variety rather than a formally described subspecies.
Visual Characteristics (Macro Morphology)
- Cap coloration: Cinnamon to golden/caramel-brown; some descriptions note a darker center when mature
- Cap shape: Convex when young, flattening with maturity; often broad at full development (typical cubensis progression)
- Stem: Thick, pale to whitish stem is commonly described; stems may be hollow or semi-hollow in mature specimens (typical of many cubensis)
- Veil remnants: Partial veil frequently leaves an annular ring on the stipe (a hallmark cube trait)
- Bruising: Blue oxidation on handling or damage (characteristic of psilocybin-containing Psilocybe species)
Microscopy & Taxonomy Notes
- Spore print color: Deep purplish-brown (typical of P. cubensis)
- Gill structure: Adnate to adnexed attachment; gills darken as spores mature (species-typical)
- Why B+ is favored: Widely referenced “standard cube” morphology makes it useful for microscope learners comparing spores, gill edge features, and general cubensis baselines
Research Notes (Educational Context)
Educational and descriptive context only.
- Reported “strain” reputation: Often characterized in modern literature as resilient and consistent under varied conditions, making it a frequent reference point in general strain discussions
- Analytical relevance: In community and review-style writing, B+ is commonly mentioned alongside other “classic” cubensis lines when discussing variability in alkaloid expression and morphology across named varieties
- Naming notes: The meaning of “B+ / B Plus / B Positive” is widely debated; “Be Positive” is a common interpretation, though definitive documentation is scarce
Cultivation Characteristics (High-Level Overview)
- Difficulty: Commonly described as beginner-friendly genetics (descriptive only)
- Growth behavior: Frequently reported as consistent and robust in general discussions (descriptive only)
- Environmental tolerance: Often noted as broadly adaptable across varied environments (descriptive only)
For safety and compliance, this section is descriptive only and excludes instructions, parameters, or cultivation techniques.
Collector & Researcher Highlights
- Widely recognized variety: One of the most frequently cited and distributed named P. cubensis lines
- Educational standard: Often recommended for morphology/spore familiarity work due to its “classic cube” presentation
- Abbreviation: Commonly referred to as B+ or B Plus Positive
Why liquid culture over spores (for research):
- Established genetics: derived from a stable, widely recognized lineage
- Cleaner observation: minimal extraneous material for microscopy prep – Made in front of a scanned, 99.99% efficient HEPA filter
- Reliable morphology: ideal for repeated comparative study
- Shelf Life: 9-12 Months (Refrigerated DO NOT FREEZE)
Shipping: Fast and Free USPS shipping to all 50 states and U.S. territories including Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands, and American Samoa. Expedited USPS Priority options available. Products shipped daily (see our Shipping FAQ page for shipping times and questions) No cheap culture and outrages shipping cost. What you see is what you pay.
- Satisfaction guarantee on all orders
- Military & First Responder discount available
- Shroomery verified & trusted vendor with over 50,000+ cultures shipped
- See what our customers say about us!
- All payment methods are accepted, including cash, money order, debit, credit, cryptocurrency at checkout, CashApp, and Venmo.
Important: Products are strictly intended for microscopy and taxonomy research only. Do not use where prohibited by law. None of our products contain any illegal or active alkaloids at the time of shipment.
Add B+ (B Positive) to your genetic library and explore one of the most recognizable P. cubensis reference varieties in modern microscopy culture.
Important Notice:
Once home, cubensis cultures should be kept in a fridge between 33-40°F to maximize their lifespan of 6-12 months.
Do not let your cultures freeze! While most will survive one freeze-thaw cycle, multiple freeze-thaw cycles will kill any live mycelium.
This product description is provided strictly for educational, historical,
We are not able to offer any cultivation or growing information or advice. Any such requests will be ignored.
and scientific context. Products are intended for microscopy and taxonomy
research only. Not for cultivation or consumption.
Please comply with all applicable local, state, and federal laws.
Drew –
A plus very professional very fast shipping very nice man was very informative and the shipped very fast would come back here in a heartbeat 10 Stars
Aaron –
Fast shipping A+ looks great
Lamar –
Everything came quickly, efficiently and without any problems. I canƒ??t wait to start my mycology research :microscope:
Willy –
It was shipped out very quickly and showed up with some free stickers. I wouldn't hesitate recommending CubeCulture to anyone looking to study some liquid culture. All of my orders have gone off without a hitch.
Edward g. –
Been 3 days and already growing mycelium fantastic and seller sent me a bonus syringe. 10/10
Kyle L. –
I was very pleased with the fast shipping and quality of the product. Will be ordering again and often!
Brandi J. –
As we know, nothing with spores or culture are guaranteed and for that reason, unfortunately I had no ƒ??luckƒ?� with my LC syringesƒ?? however the company was extremely quick to issue a refund and were very polite. I will try again with them to make a success story. Thanks yƒ??allƒ?? look for my purchase around the first of the year!
Lamar –
I would like to say that this vendor is by far one of the best vendors you can find if you are a mushroom researcher, he is fast at shipping, responds quickly, does tons of giveaways and is reliable. I couldnƒ??t ask for anyone better than CubeCulture!!!!
James C. –
Great service amazing product
Fabien F. –
Iƒ??ve order a few times from this source
Very reliable and always speedy with shipments
Plus some cool ass stickers!!
Robert B. –
Perfect! Loaded with mycelium. Just five days after inoculation and itƒ??s time for a shake and break. Great genetics! Thank you!
Philip R. –
As far as I can tell this order of liquid culture is just water. No response of any kind. Expensive and worthless.
Jason F. –
Fast and discreet shipping. Wouldƒ??ve given 5 but plunger on syringe was broke. Okay though. Still able to research. Couldƒ??ve been USPS but maybe better packaging. Thank you.
Kyle –
I was new to mycology and finding somewhere to get my spores was a process to say the least but with a friend's recommendation I purchased liquid culture from Cube Culture. They were at my door in just a few days and the quality put into their products is what I noticed first but what matters most is culture itself, which was alive and did it's job very well. I'm not so new anymore but continue to use their cultures even after trying a few of their competitors. Trust me when I say that the one thing that discouraged me the most in myco was having nothing happened after a month of waiting! If you were anything like me when I start a new hobby is the need to see some results for my time and work or I lose interest. So if that sounds like you, then start with good materials if you want good results. There's a few things you can skimp on in the myco field and shortcuts you learn how to incorporate into your"style" but one thing you can't skimp on is SPORES!!!
Pandaskis –
Just for customer service alone I would give a 5 star. If there's anything less than perfect about their cultures, don't hesitate to contact them before reviewing; they are the nicest people ever!
P.S the Cultures are bomb too ;P
Alexa –
Didnƒ??t grow anything at all out of 10 bags.
A –
Did not work all
BAM –
All I can say is Cube Culture is the truth! Great customer service. Fast shipping and totally legit. For those new to CC and not sure about it! Don't stress feel confident purchasing from this company. There not just out to get your money this company is solid. Thanks again Cube Culture ill definitely be purchasing again..
Frank W. –
Good quality liquid culture.
James S. –
Very robust culture sample. Was shipped and delivered in a timely manner. Looking forward to ordering more soon. Thanks Cube Culture!
Charles K. –
Again, Iƒ??m absolutely impressed with the genetics. The customer service is impeccable. The delivery times are amazing. 10/10 would recommend.
James –
My first to work, must have been super forgiving haha. Fantastic vendor, great product and service. Using LC is way better than spores, this strain is hardy.
Mark –
Great research done with CC. Iƒ??m new to microscopy and most of my early research failed, but cubeculture samples have gone beyond expectations. I donƒ??t know where or why some people have given below five stars, but I know Iƒ??ve personally found my go to vendor. I never leave reviews, but I felt it was imperative in this situation. So hard to fail with this hobby, but Cubeculture seems nearly foolproof.
Jason M. –
So far very good
Michael S. –
Great quality and fast delivery thank y'all for your service!
Richard B. –
excellent vender!!
Jim W. –
Arrived quickly for study
David T. –
I appreciate you!
Reva Miller (verified owner) –
My order came fast with a dope sticker the LC was healthy and plentiful I got 11cc so there’s no skimpy with cube culture. I have inoculated 2 grain bags and both have a dollar bill size of healthy mycelium growing in 72hrs. I would suggest stopping your search for genetics here you found it. Goodluck to all and thank you cube culture
Anonymous (verified owner) –
Package was damaged in shipping the Ziploc baggies was open and there was only 6 cc of culture in the syringe with hardly any mycelium in the syringe
Xaioxaio (verified owner) –
Great “microscopy” results so far😉, I would recommend this to any amateurs as it provides fast results with little worries.
Joseph Y. (verified owner) –
I never received this order …placed a larger secondary order 5 days later & already have that with no issues …appears USPS lost my order (shocker) …I have contacted CC about this issue & look forward to a replacement
Eric Tricas (verified owner) –
Cube Cultures B+ genetics are amazingly robust and fast colonizing. Extremely satisfied with my continuing research results. Thank you.
Griffin Harlan (verified owner) –
Culture looks good as always!
Jakeb (verified owner) –
Fast shipping, mycelium growth is on point and fast. These are fruiting like crazy. If this would allow me to upload a photo I would.
Anonymous (verified owner) –
Excellent!
Anonymous (verified owner) –
Fast shipping so far so good
Nicholas C. (verified owner) –
Extremely fast, great product. Absolutely no complaints here
Cole (verified owner) –
I used this LC to inoculate 2 spawn bags and both got contaminated by day 4. I’m pretty sterile with my practice so I either had bad spawn bags or bad spawn. I’ll give it a 3 because I know not everything can always be perfect. As a first time customer this is unfortunately my first experience.
Anthony O. (verified owner) –
Definitely would give more than five plus if I could nice and clean liquid cultures that did great in the lab definitely looking to do more business in the future love the stickers that came in the package as well website not a scam highly recommend couldn’t have picked a better page to get my (LC) thank you CubeCultureUSA.
Sam (verified owner) –
My order came earlier Than expected, Thanks Cube Culture 😁
twotreedave (verified owner) –
well they are still the best shipping the best i have to say tho i have seen videos on how to grow them in my po its wrong i do not ever cut open the bag or spray water on them the bag has a air filter on it when it sweets in the bag that’s enough of water for them every time i have cut open the bag and sprayed it with water it got infected so this round two bags left it alone giant grow i could not believe it so im gona stick with this way ant ty very much cc your the best very happy ty
twotreedave (verified owner) –
well they are still the best shipping the best i have to say tho i have seen videos on how to grow them in my po its wrong i do not ever cut open the bag or spray water on them the bag has a air filter on it when it sweets in the bag that’s enough of water for them every time i have cut open the bag and sprayed it with water it got infected so this round two bags left it alone giant grow i could not believe it so im gona stick with this way ant ty very much cc
Anonymous (verified owner) –
My order arrived quickly. Thanks
Anonymous (verified owner) –
Fast shipping and an added bonus they give you cool stickers too
Kyle (verified owner) –
Amazing service and fast shipping
curtis_osolin (verified owner) –
Awesome! Fast shipping, and good packaging. Nice strong culture, good even growth. Definitely worth it.
Anonymous (verified owner) –
Excellent
Shawn G. (verified owner) –
Quick to get . User friendly and price was good!
Chad Palmer (verified owner) –
Carlos S. (verified owner) –
It was good