Best Psilocybe Mushroom Strains for Beginners: Golden Teacher, B+, Penis Envy, and Albino A+
- Phil O'Zybyn
- May 15
- 15 min read
Best Psilocybe Mushroom Strains for Beginners: Golden Teacher, B+, Penis Envy, and Albino A+
Four strains. Vastly different genetics, colonization profiles, and cultivation demands. Here's how to understand what you're working with — and which one is the right starting point for your research setup.
Category: Mushroom Genetics & Strains
Keywords: psilocybe mushroom strains, golden teacher strain, B+ strain, penis envy strain, albino A+ strain, mushroom genetics, spore viability, genetic stability, psilocybe cubensis strains, mushroom cultivation, colonization temperature, mycelium growth, spore syringe, liquid culture, grain spawn, Canadian mycology, microscopy research
Read time: ~12 minutes
Published by: Spores Lab | sporeslab.io
Best Psilocybe Mushroom Strains for Beginners: Golden Teacher, B+, Penis Envy, and Albino A+
When researchers and cultivators begin exploring Psilocybe cubensis genetics, one of the first questions they encounter is also one of the most consequential: which strain? The answer isn't simple, because strains of P. cubensis differ meaningfully in their genetic stability, colonization behaviour, spore production, fruiting characteristics, and tolerance for cultivation conditions. Choosing the wrong strain for your skill level or setup isn't just inconvenient — it can produce months of frustrating results before the real variable is identified.
At Spores Lab, we carry four strains of Psilocybe cubensis: Golden Teacher, B+, Penis Envy, and Albino A+. Each has a distinct genetic profile and cultivation personality. This guide is a complete breakdown of all four — their origins, mycelium growth characteristics, spore profiles, and what they demand from a cultivator — so you can make an informed decision about where to start and where to go next.
All content here is framed in terms of mushroom genetics and cultivation performance. Spores Lab products are sold for microscopy and taxonomic research purposes. Possession of Psilocybe spores for research is legal in Canada; cultivation laws vary by jurisdiction — always verify your local legal framework before proceeding.
Understanding Psilocybe cubensis Strain Genetics
Before comparing individual strains, it helps to understand what a 'strain' actually means in P. cubensis genetics. Unlike plant cultivars, which can be stabilized through selective breeding over many generations, Psilocybe strains are largely landrace populations, spontaneous mutations, or cultivator selections maintained through spore propagation or cloning. The term 'strain' is used loosely in the community, and genetic drift between lineages maintained by different suppliers is common.
What this means practically: two suppliers selling 'Golden Teacher' may not be selling genetically identical material. Genetic stability — the consistency of morphological and cultivation characteristics across generations — varies significantly between strains and between suppliers' lines. This is one of the strongest arguments for sourcing from suppliers who actively maintain and test their cultures, rather than simply passing along bulk spore material.
The characteristics cultivators care about most are:
• Colonization speed and aggressiveness: How quickly and thoroughly does mycelium penetrate grain spawn and bulk substrate?
• Contamination resistance: How competitive is the mycelium against common contaminants like Trichoderma and Bacillus?
• Spore production: How densely does the strain sporulate, and are spores reliably viable?
• Fruiting reliability: How readily does the strain initiate pinning under standard conditions?
• Morphological consistency: Does the strain produce consistent fruiting body morphology across flushes and generations?
• Temperature tolerance: How forgiving is the strain of temperature variation during colonization and fruiting?
These are the lenses through which we'll evaluate each strain.
Golden Teacher: The Benchmark Beginner Strain
Golden Teacher is, without question, the most widely studied and cultivated P. cubensis strain in the world. Its reputation as the 'beginner strain' is well-earned — but understanding why it performs well for beginners reveals something important about mushroom genetics more broadly.
Origin and Genetic Background
Golden Teacher's precise origin is undocumented, but it appears to have entered widespread cultivation in the late 1980s, likely as a landrace collection from a subtropical or tropical environment. Its name references the distinctive golden-yellow caps of mature fruiting bodies and, informally, its reputation as a 'teaching' strain — one that reliably rewards correct technique and clearly signals when conditions are wrong.
From a genetics standpoint, Golden Teacher shows high genetic stability across generations, which is relatively rare among P. cubensis strains. This stability means that cultivators working with Golden Teacher can reliably replicate results, making it valuable for research contexts where consistency matters.
Colonization Performance
Golden Teacher colonizes grain spawn and bulk substrate at a moderate-to-fast pace — typically 10–14 days for a standard grain jar at 22–27°C. The mycelium growth is robust and visually distinctive: thick, ropy, rhizomorphic threads that indicate a competitively vigorous culture. This growth pattern is associated with good contamination resistance — the mycelium physically outcompetes many competing organisms by establishing quickly and thoroughly.
Optimal colonization temperature range is 22–27°C (71–80°F), with performance peaking around 24–26°C. The strain tolerates moderate temperature fluctuation without significant loss of vigour — a meaningful advantage for home cultivators working without precise environmental control.
Spore Profile
Golden Teacher produces dense, dark purple-black spore prints with high spore viability. The spores are characteristic P. cubensis morphology — sub-ellipsoid to ellipsoid, thick-walled, 11.5–17 × 8–11 μm under microscopy — and sporulate reliably even from first-flush fruiting bodies. For microscopy research, this consistent spore production makes Golden Teacher one of the most useful strains for comparative studies.
Fruiting Characteristics
Pinning initiates readily with standard fruiting triggers: temperature drop of 3–5°C from colonization temperature, increased fresh air exchange, and relative humidity of 90–95%. Golden Teacher pins reliably across multiple flushes, with the first two flushes typically producing the largest and most morphologically consistent fruiting bodies.
The caps are broad and convex, golden-yellow to light brown, with a pronounced umbo (central bump) that flattens with maturity. Stipe (stem) is thick and firm. Overall morphology is highly consistent — one of the hallmarks of this strain's genetic stability.
Beginner Assessment
Recommended for: All beginners. Golden Teacher is the logical starting point for anyone entering P. cubensis cultivation or microscopy research. Its forgiving colonization, reliable spore production, and consistent genetics provide a baseline against which other strains can be meaningfully compared.
B+: The Most Adaptable Strain
B+ (sometimes written 'Be Positive') is often cited alongside Golden Teacher as a top beginner strain, but its specific advantage is different: where Golden Teacher excels in consistency and stability, B+ excels in environmental adaptability. It has the widest temperature tolerance of any P. cubensis strain in common cultivation, making it particularly relevant for Canadian cultivators dealing with seasonal temperature variation.
Origin and Genetic Background
B+ is generally attributed to a Florida cultivator known as 'Mr. G', who reportedly developed or isolated the strain in the 1990s. The 'B+' designation reflects the strain's perceived broad adaptability — it performs adequately across a range of conditions where more finicky strains struggle.
Genetically, B+ shows moderate genetic stability. It is somewhat more prone to morphological variation across generations than Golden Teacher, producing occasional albino or partially albino sectors. This variation is a natural expression of the strain's genetic diversity rather than a degradation, but it means that spore syringe lineages can vary more noticeably between batches than Golden Teacher equivalents.
Colonization Performance
B+ colonizes vigorously at 23–27°C (73–80°F) and, critically, maintains acceptable performance down to 20°C and up to 28°C — a temperature range that encompasses most unheated Canadian indoor spaces during spring, summer, and autumn. This broad tolerance directly reduces contamination risk for cultivators who cannot maintain tight temperature control: a culture that colonizes strongly even at 21°C leaves less window for contaminants to establish.
The mycelium growth pattern is dense and robust, with pronounced aerial mycelium (a fluffy white layer above the substrate surface). This aerial growth is sometimes mistaken for contamination by beginners, but it is a characteristic B+ expression and a positive sign of vigorous colonization.
Macro close-up of vigorous white ropy mycelium colonizing grain in a clear jar. Thick rhizomorphic threads clearly visible. Clean, clinical.
Spore Profile
B+ is one of the most prolific sporulators among P. cubensis strains — mature caps produce very dense, dark prints with high spore viability. The spores are morphologically standard for the species, making them suitable for comparative microscopy. The high spore density also means spore syringes prepared from B+ prints tend to be reliably dense, which benefits inoculation success rates.
Fruiting Characteristics
B+ initiates pinning readily and produces large, caramel-brown caps with thick stipes. Individual fruiting bodies tend to be larger on average than Golden Teacher, though with somewhat more variation in cap diameter and shape. The strain is a reliable multi-flush producer, with four or more flushes common under good conditions.
One notable characteristic: B+ sometimes produces unusually large, wide-capped specimens — what cultivators informally call 'dinner plate' caps. This is a genetic expression rather than an environmental artifact and is consistent across well-maintained B+ lineages.
Beginner Assessment
Recommended for: Beginners in variable-temperature environments, particularly Canadian home cultivators without dedicated climate control. If you're growing in a basement, garage, or spare room where temperature isn't tightly regulated, B+ is the most forgiving option. Also an excellent strain for cultivators who want high-density spore prints for microscopy.
Penis Envy: High-Performance, High-Demand
Penis Envy is the most genetically distinctive and cultivation-demanding strain Spores Lab carries. Its morphology is immediately recognizable — a thick, bulbous stipe and a small, underdeveloped cap that rarely fully opens — and it represents a significant departure from typical P. cubensis genetics. It is not a beginner strain.
Origin and Genetic Background
Penis Envy's origin story is one of the most frequently told in cultivation circles. The strain is widely attributed to Terence McKenna, who reportedly collected spores from an unusually large P. cubensis specimen in the Amazon in the early 1970s. The strain was later developed and distributed by Steven Pollock and subsequently by cultivator 'RG', who isolated the characteristic mutant morphology.
The distinctive appearance of Penis Envy — the thick, phallic stipe and underdeveloped veil — reflects genuine genetic mutation rather than environmental expression. Specifically, the mutation affects veil formation and cap expansion, resulting in the characteristic morphology. This mutation also has cultivation consequences: the underdeveloped veil means the cap rarely opens to drop spores freely, resulting in characteristically sparse or absent spore prints.
This is the defining practical challenge of Penis Envy from a spore viability and microscopy standpoint: spore availability is dramatically lower than in standard strains. Prints may be faint or require collection from the gills directly. Liquid culture propagation is often preferred for Penis Envy for this reason, as it bypasses the sparse sporulation limitation.
Colonization Performance
Penis Envy colonizes more slowly than Golden Teacher or B+ — plan for 14–21 days on grain at the optimal 24–27°C (75–80°F). The mycelium is dense and ropy but grows more cautiously than other strains, making it more vulnerable to contamination during the extended colonization window. Sterile technique must be impeccable: the same contamination event that a fast-colonizing B+ might outpace will establish and win against the slower Penis Envy.
Temperature sensitivity is higher than in beginner strains. Penis Envy performs best within a tighter band — 24–27°C is the practical working range, and temperatures below 22°C noticeably slow colonization and increase contamination risk. Consistent mushroom environment control is more important here than with Golden Teacher or B+.
Fruiting Characteristics
Despite the slower colonization, Penis Envy is regarded as producing some of the densest fruiting bodies of any P. cubensis strain. The thick stipe and compact cap contain more tissue per fruiting body than standard morphology strains. Pinning may be slower to initiate and less abundant than other strains, but fruiting body quality is consistently high when conditions are right.
Multiple flushes are possible but require careful substrate management. The strain benefits from longer rest periods between flushes and responds well to cold shocking (submerging the block in cold water for 12 hours) between flushes.
Beginner Assessment
Recommended for: Intermediate to experienced cultivators with solid sterile technique and reliable temperature control. Penis Envy rewards precision but punishes shortcuts. If you've successfully grown Golden Teacher or B+ through multiple flushes and want to challenge your technique, Penis Envy is the natural next step. It is not the right starting point — the slow colonization, sparse sporulation, and temperature sensitivity create too many compounding variables for a first grow.
Albino A+: Distinctive Genetics, Intermediate Demands
Albino A+ occupies an interesting middle ground: more demanding than Golden Teacher or B+, but more accessible than Penis Envy. Its primary distinguishing characteristic is its albino genetics — a mutation that suppresses pigmentation in both mycelium and fruiting bodies, producing white-to-pale-blue caps and, critically, white or clear spores.
Origin and Genetic Background
Albino A+ is generally regarded as a selected albino variant of the 'A+' strain (also known as 'A-strain' or 'Amanita-like', referring to its veil characteristics rather than any genetic relationship to Amanita). The albino selection occurred in cultivation, where occasional depigmented variants were isolated and propagated.
The albino mutation in Albino A+ is a genuine genetic modification affecting the melanin synthesis pathway, not simply a pale phenotype caused by environmental conditions. This mutation has meaningful downstream effects on spore viability and spore syringe preparation: because the spores lack the characteristic dark pigmentation of standard P. cubensis, they are white or clear, making them significantly harder to see in suspension and on prints.
For microscopy purposes, this is both a challenge and an advantage: the absence of pigmentation makes spore morphology easier to examine under staining conditions, but the low visual contrast of clear spores makes density assessment and spore viability checking more difficult with standard light microscopy.
Colonization Performance
Albino A+ colonizes at a moderate pace — somewhat slower than Golden Teacher but faster than Penis Envy — at 23–27°C (73–80°F). The mycelium is white, dense, and often produces a striking blue bruising reaction when disturbed, which is a characteristic of the strain rather than a sign of contamination or damage.
The albino genetics introduce one specific contamination risk: because the mycelium is uniformly white, early-stage contamination (particularly white or light-coloured moulds and bacterial colonies) can be harder to visually distinguish from healthy growth. Daily inspection is important, and cultivators should look for texture differences — contamination typically has a distinctly different texture to healthy mycelium growth — rather than relying solely on colour.
Spore Profile
The white-to-clear spore characteristic of Albino A+ makes spore print collection and syringe preparation require more care than standard strains. Prints may appear faint or nearly invisible on dark paper; white paper or glass is sometimes preferred for collection. Under microscopy, the spores are morphologically standard for P. cubensis — the same sub-ellipsoid form — but the absence of pigmentation can make the spore wall structure more clearly visible under certain illumination conditions, which has research value.
When preparing spore syringes from Albino A+, the absence of visible pigmentation makes density estimation by visual inspection unreliable. Prepare syringes with care and test viability before committing to a full inoculation session.
Fruiting Characteristics
Albino A+ produces striking fruiting bodies — pale white to light blue-grey caps, thick stipes, and a pronounced veil that often tears to reveal a skirt-like annulus. The fruiting bodies are visually distinctive and the morphology is reasonably consistent across flushes, though some variation in cap colour intensity (ranging from near-white to light tan) is normal and reflects individual expression of the albino mutation.
Pinning initiation is reliable under standard conditions, and the strain is a good multi-flush producer. Fruiting body size is moderate — larger than the average P. cubensis specimen but not as compact and dense as Penis Envy.
Beginner Assessment
Recommended for: Beginners who have successfully completed at least one grow with Golden Teacher or B+ and want to explore albino genetics. The main challenges — visual contamination detection and clear spore assessment — are manageable with a bit of extra diligence. Albino A+ is an excellent choice for cultivators interested in genetic diversity and spore morphology under microscopy, precisely because its unusual spore characteristics offer research contrast against standard pigmented strains.
Strain Comparison at a Glance
The table below summarises the key cultivation and genetic characteristics of all four Spores Lab strains for quick reference.
Strain | Colonization | Fruiting temp | Spore density | Best for beginners |
Golden Teacher | 22–27°C / 71–80°F | 22–25°C / 72–77°F | High — dense prints | Yes — fast, forgiving, reliable colonizer |
B+ | 23–27°C / 73–80°F | 22–26°C / 72–79°F | Very high — prolific | Yes — widest temperature tolerance of the four |
Penis Envy | 24–27°C / 75–80°F | 22–25°C / 72–77°F | Low — sparse prints | Intermediate — slow colonizer, needs sterile precision |
Albino A+ | 23–27°C / 73–80°F | 22–25°C / 72–77°F | Low–moderate — clear/white spores | Intermediate — albino genetics require cleaner technique |
Choosing Your First Strain: A Framework
Given the profiles above, here is a practical decision framework for beginners selecting their first Psilocybe cubensis strain:
Start with Golden Teacher if:
• You are completely new to Psilocybe cubensis cultivation or microscopy research
• You want maximum genetic stability and reproducible results for research purposes
• You have moderate temperature control (22–27°C) but not precise climate management
• You want the most widely documented strain for comparative reference against published research
Start with B+ if:
• You are a beginner working in a variable-temperature environment (Canadian home growing without dedicated climate control)
• You want high-density spore prints for microscopy with minimal preparation difficulty
• You want the most forgiving colonization profile of any strain we carry
Move to Albino A+ when:
• You have at least one successful grow completed with Golden Teacher or B+
• You are specifically interested in exploring albino genetics and their implications for spore morphology under microscopy
• You are comfortable with the additional visual monitoring required due to white mycelium and clear spores
Move to Penis Envy when:
• You have solid sterile technique developed over multiple successful grows
• You can maintain stable 24–27°C colonization temperatures
• You understand and accept the sparse spore viability characteristic and are prepared to work with liquid culture propagation rather than spore prints
• You want to push your technique and work with the most genetically distinctive P. cubensis strain in common cultivation
The Role of Inoculant Quality Across All Strains
Regardless of which strain you choose, the quality of your starting inoculant shapes every outcome that follows. A spore syringe or liquid culture carrying contamination introduces that contamination directly into your substrate — no amount of excellent sterile technique downstream recovers from a compromised starting point.
The characteristics that matter most in an inoculant:
• Spore viability: Are the spores alive and capable of germination? Spores degrade over time and with poor storage conditions. Fresh, properly stored spores from a tested source are fundamental.
• Genetic stability: Does the lineage reliably produce the expected strain characteristics? Genetic drift in poorly maintained lines means the strain you purchase may not perform like documented Golden Teacher or B+ genetics.
• Contamination-free preparation: Was the syringe or culture prepared under sterile conditions? Even a visually clean syringe can carry bacterial contamination that doesn't become apparent until substrate inoculation.
At Spores Lab, every product is tested for spore viability and genetic stability before shipping. Our Canadian supply chain means shorter storage and transit times — a direct benefit to spore viability, particularly for strains like Albino A+ where clear spores make visual density assessment unreliable.
Explore the Full Growing System
Strain selection is the starting point, but the full cultivation system is what produces reliable results. On sporeslab.io you'll find guides across all seven pillars: Mushroom Growing Basics for foundational knowledge; Substrate Preparation covering sterilization protocols for grain spawn and bulk substrate; Contamination & Sterile Technique including Trichoderma prevention, still air box use, and agar culture work; Growing Environment for temperature and humidity management across species; Mushroom Genetics & Strains (this pillar) for everything from strain selection to agar isolation; Growing Equipment for a complete tool guide; and Research & Microdosing for science-forward content on psilocybe research. Explore them all at sporeslab.io/blog.
FAQ: Psilocybe Cubensis Strains
Q: Is Golden Teacher the same strain regardless of supplier?
Not necessarily. 'Golden Teacher' is a common name rather than a genetically standardised designation. Lineages maintained by different suppliers may have diverged meaningfully through genetic drift, particularly if maintained exclusively through spore propagation without periodic isolation and selection. When sourcing Golden Teacher — or any named strain — the supplier's maintenance practices and genetic stability testing matter as much as the strain name itself.
Q: Why does Penis Envy produce so few spores?
The sparse sporulation in Penis Envy is a direct consequence of the same genetic mutation that produces its distinctive morphology. The mutation affects veil development and cap expansion — the cap rarely fully opens, which means the gills are not fully exposed to drop spores freely. This is not a sign of poor culture health; it is an inherent genetic characteristic of the strain. Cultivators working with Penis Envy for microscopy purposes often collect spore material directly from the gills of mature specimens or work with liquid culture propagation instead of spore prints.
Q: Can I mix strains in the same substrate?
This is not recommended for cultivation purposes. Different strains have different colonization speeds and competitive characteristics — mixing inoculants almost always results in one strain outcompeting the other, with unpredictable results. For research purposes, mixed inoculants also compromise the genetic integrity of both lines. Work with one strain per substrate batch, and maintain separate storage for each strain's inoculant.
Q: How do I assess spore viability in Albino A+ when the spores are clear?
Visual assessment of spore density in Albino A+ syringes is less reliable than with pigmented strains. The most practical approach is to assess viability through germination testing on agar: a small inoculation of a test plate will show germination within 3–7 days under warm conditions if the spores are viable. Alternatively, work with liquid culture rather than spore syringes for Albino A+ — the culture's viability is easier to assess visually through mycelium growth rather than spore density.
Q: Are the strains at Spores Lab suitable for microscopy research?
Yes — all four strains are maintained specifically for microscopy and research use. Each product ships with tested spore viability and documented genetic stability. Golden Teacher and B+ offer the most consistent spore production for comparative research; Albino A+ offers unique morphological contrast under microscopy; and Penis Envy provides access to the most genetically distinctive morphology in P. cubensis taxonomy. Spores Lab ships across Canada for microscopy and taxonomic research purposes.
Q: What substrate works best for each strain?
All four strains perform well on sterilized grain spawn (rye, wheat, or millet) for initial colonization. For bulk substrate, Golden Teacher and B+ are flexible and perform on a range of mixes including coco coir, vermiculite, and pasteurized manure. Penis Envy benefits from nutrient-dense supplemented substrates and performs best on Masters Mix or similar high-nutrition hardwood blends sterilized at 15 PSI. Albino A+ is adaptable and performs similarly to Golden Teacher on standard bulk substrates.
Ready to start with the right strain? Shop Spores Lab.
Browse viability-tested spore syringes and liquid culture products for all four strains at sporeslab.io/shop. Explore the full genetics and strains guide and all seven blog pillars at sporeslab.io/blog.
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