Spore Vials
by Mondo
The Mondo McKennaii spore vial is a 10 ml suspension of Psilocybe cubensis McKennaii spores, ready for microscopic research or home cultivation. Named after Terence McKenna — the American philosopher, writer, and psychonaut who spent decades exploring the frontiers of consciousness — this strain carries the trailing "ii" as a nod to the so-called Hawaiian cubensis lineage and its reputation for serious potency. If you want a cubensis variety that punches above its weight class, McKennaii belongs on your shortlist.
McKennaii is one of the stronger cubensis varieties you can grow at home. Where a Golden Teacher gives you a gentle, introspective session, McKennaii dials up the intensity — medium to strong visual effects and a distinctly philosophical headspace that earned it the McKenna name in the first place. According to a 2025 study published in PMC, "numerous studies have highlighted the therapeutic potential of psychedelics in clinical applications," with Psilocybe cubensis strains showing varied chemical profiles depending on genetics and growing conditions (PMC, 2025). McKennaii sits firmly at the potent end of that spectrum.
The fruit bodies tend to be medium-sized with thick stems and caps that bruise a deep blue — a visual indicator of psilocybin oxidation that experienced growers recognise immediately. The blue bruising on McKennaii is more pronounced than on milder strains like B+ or Cambodian, which tells you something about what's inside. Under the microscope, the spores are dark purple-brown, subellipsoid, and print beautifully on foil for further study.
| Spec | Value |
|---|---|
| Brand | Mondo |
| Species | Psilocybe cubensis |
| Strain | McKennaii |
| Volume | 10 ml spore suspension |
| Potency | High (above average for cubensis) |
| Visual character | Medium to strong |
| Colonisation speed | Moderate |
| Fruit body size | Medium, thick stems |
| Spore colour | Dark purple-brown |
| SKU | SH0026 |
| Storage | Cool, dark place (2-8°C for long-term) |
| Included | 1 vial (10 ml), 1 sterile syringe, 2 alcohol swabs |
Mondo keeps it straightforward. Inside the package you'll find:
The vial format has one genuine advantage over spore prints: the spores are already hydrated and evenly distributed in solution, so you get consistent inoculation across your substrate. No scraping, no guesswork about how many spores you're actually depositing. Just shake the vial for 10-15 seconds before drawing up, and you're ready to go.
We get asked this constantly: McKennaii or Golden Teacher? Here's the honest breakdown.
| Feature | McKennaii | Golden Teacher |
|---|---|---|
| Potency | High — above average cubensis | Moderate — classic middle ground |
| Visual effects | Medium to strong | Mild to medium |
| Character | Philosophical, intense | Warm, introspective, "teaching" |
| Colonisation speed | Moderate — slightly slower | Fast — very forgiving |
| Contamination resistance | Good | Very good |
| Best for | Growers who want potency | First-time growers |
If this is your first cultivation project, the Golden Teacher is more forgiving — it colonises faster, shrugs off minor sterility mistakes, and flushes reliably. McKennaii rewards patience and clean technique with fruit bodies that carry noticeably more weight per gram. We'd pick McKennaii if you've already got one successful grow under your belt and want to step things up.
Sterile technique is everything. We've seen growers lose entire batches to one ungloved hand touching substrate. Follow these steps and you'll dramatically cut your contamination risk.
We've been selling Mondo spore vials since they first hit the market, and McKennaii has been a consistent top seller for good reason. The one honest limitation: McKennaii can be slightly fussier during colonisation than more beginner-friendly strains. It doesn't race through substrate the way a PES Amazonian does, and it seems to prefer slightly lower fruiting temperatures — around 21-23°C rather than the 24-25°C that most cubensis strains thrive at. Drop the temperature a couple of degrees when you move to fruiting conditions and you'll see better pinset formation.
The fruit bodies themselves have a distinct look — shorter and stockier than Golden Teacher, with caps that often stay partially closed even at maturity. They bruise intensely blue when handled, which stains your fingers and tells you the psilocybin content is substantial. According to research on Psilocybe cubensis biomass stability, psilocybin, psilocin, baeocystin, norbaeocystin, and aeruginascin are all tryptamines structurally similar to the neurotransmitter serotonin (PubMed, 2020). McKennaii's pronounced bruising suggests a generous alkaloid profile across these compounds.
One more thing we've noticed over the years: McKennaii's second and third flushes can sometimes outperform the first in terms of individual fruit body size. Don't give up on your cake after flush one — soak it, put it back in fruiting conditions, and let it surprise you.
The Mondo McKennaii spore vial keeps best in a refrigerator at 2-8°C, away from light. At this temperature, viable spores last several months. Room temperature storage works for a few weeks but reduces germination rates over time. Never freeze spore vials — ice crystals rupture cell walls and kill the spores. The included syringe is single-use sterile packaging; once opened, use it within the same session or re-cap it carefully and refrigerate.
Complete your cultivation setup with a Mondo Grow Kit — the substrate comes fully colonised, so you can skip the inoculation step entirely and go straight to fruiting. If you'd rather inoculate your own substrate, grab a bag of sterilised grain spawn and a still air box to keep contamination at bay. The Mondo Vial Psilocybe cubensis Golden Teacher is the best spore vial for first-time growers who want a forgiving comparison strain alongside McKennaii.
Psilocybe cubensis is a species whose principal active compounds are psilocybin and psilocin. According to research published in 2024, "Psilocybe cubensis is a species of psilocybin mushroom of moderate potency whose principal active compounds are psilocybin and psilocin" (PubMed, 2024). McKennaii, as a particularly potent cubensis strain, likely contains above-average concentrations of these tryptamine alkaloids — though exact percentages vary by growing conditions, substrate, and harvest timing.
A 2025 review in PMC examined cultivation parameters across multiple cubensis strains and confirmed that genetics, substrate composition, and environmental conditions all influence the final alkaloid profile (PMC, 2025). This means your growing technique directly affects what you harvest. Dialling in temperature, humidity, and fresh air exchange isn't just about yield — it shapes the chemistry of the fruit bodies themselves.
Research into the stability of psilocybin and related compounds in cubensis biomass found that proper drying and storage conditions are critical for preserving alkaloid content over time (PubMed, 2020). If you're growing McKennaii for research purposes, harvest at the right moment — just as the veil breaks — and dry thoroughly with a dehydrator at 35-40°C for the most consistent results.
One 10 ml vial typically inoculates 5-10 litres of substrate, depending on your injection volume. At 2-3 ml per litre of grain, you'll get roughly 3-5 separate jars from a single vial. That's enough for multiple growing projects if you plan your inoculation carefully.
Slightly. McKennaii colonises a bit slower and prefers cooler fruiting temperatures around 21-23°C. It's not dramatically more difficult, but it rewards clean sterile technique. If you've done one successful grow with any cubensis strain, you'll manage McKennaii without trouble.
Stored at 2-8°C in a fridge, Mondo spore vials remain viable for several months. At room temperature, viability drops after a few weeks. Never freeze them — ice crystals destroy the spores. Use them sooner rather than later for the best germination rates.
Rye grain is the go-to for colonisation, then transfer to a bulk substrate of coco coir and vermiculite for fruiting. McKennaii isn't picky about substrate type, but it does benefit from a slightly higher moisture content in the fruiting chamber. Brown rice flour cakes (PF Tek) also work for smaller-scale projects.
McKennaii naturally colonises at a moderate pace — slower than Golden Teacher or B+. If it's taking longer than 14 days on grain at 24-28°C, check your temperature is consistent and that you shook the vial thoroughly before inoculating. Uneven spore distribution is the most common cause of patchy colonisation.
Absolutely. The 10 ml suspension contains millions of spores that show up beautifully under 400x magnification. Psilocybe cubensis spores are dark purple-brown, subellipsoid, and roughly 11-17 x 7-12 micrometres. Place a drop on a slide, cover, and you're set for hours of study.
McKennaii sits in the upper range of cubensis potency — noticeably stronger than Golden Teacher, B+, or Cambodian. The philosophical character and medium to strong visual component set it apart. It's often compared to the Hawaiian cubensis variety in terms of intensity, which is where the "ii" suffix comes from.
Last updated: April 2026
Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.
