Spore Vials
by Mondo
The Mondo PES Amazonian spore vial is a 10ml vial packed with spores from one of the tallest-growing Psilocybe cubensis strains available — a variety believed to originate from the Amazon rainforest, first distributed by Pacific Exotica Spora. These spores colonise fast, fruit generously, and produce mushrooms that regularly hit 15cm in height, with some growers reporting specimens stretching to 30cm. If you've already got a few successful grows under your belt and want something with serious stature and potency, this is the vial to reach for.
The PES Amazonian is not your typical cubensis. Where most strains top out around 8–10cm, the Amazonian regularly pushes past 15cm — and we've heard credible reports of 30cm fruit bodies from growers who dialled in their conditions. The name comes from Pacific Exotica Spora, the company that first made this strain commercially available, though the genetics are believed to trace back to the Amazon basin. That jungle heritage shows: these mushrooms are vigorous colonisers, aggressive fruiters, and they produce dense, meaty caps on thick stems.
From what we've seen over the years, the PES Amazonian sits comfortably in the upper range of cubensis potency. According to research published in PMC, "numerous studies have highlighted the therapeutic potential of psychedelics in clinical applications" and Psilocybe cubensis strains vary meaningfully in their psilocybin and psilocin concentrations (Exploring Psilocybe cubensis Strains, 2025). The PES Amazonian is consistently rated as one of the stronger cubensis varieties — not the absolute ceiling, but well above average. If you've grown Golden Teachers or B+ and want to step up, this is a natural next move.
One honest limitation: these mushrooms grow tall, which means they need headroom. If you're working with a small monotub or a grow kit with a low lid, the caps can press against the top and deform. Plan your fruiting chamber accordingly — give them space and they'll reward you with some genuinely impressive specimens.
| Spec | Detail |
|---|---|
| Brand | Mondo |
| Species | Psilocybe cubensis |
| Strain | PES Amazonian (Pacific Exotica Spora) |
| Vial Volume | 10ml |
| Contents | 1 x 10ml spore vial, 1 x hypodermic needle, 1 x alcohol swab |
| SKU | SH0114 |
| Colonisation Temp | 28–30°C |
| Colonisation Time | 10–12 days |
| Fruiting Temp | 23–27°C |
| Average Fruit Height | ~15cm (up to 30cm reported) |
| Flushes | Multiple |
| Potency | Above average for cubensis |
The Mondo vial comes ready for inoculation. The hypodermic needle and alcohol swab are included so you can work sterile straight out of the box — no hunting around for supplies. That said, we'd strongly recommend having extra alcohol swabs and a pair of nitrile gloves on hand. We've seen growers lose entire batches to one ungloved hand touching the wrong surface.
This is the question we get asked most often when someone's looking at Mondo vials. Here's how the two compare side by side.
| Feature | PES Amazonian | Golden Teacher |
|---|---|---|
| Fruit Size | Large — 15cm average, up to 30cm | Medium — 8–12cm typical |
| Colonisation Speed | Fast (10–12 days at 28–30°C) | Moderate (12–14 days typical) |
| Potency | Above average | Moderate |
| Grow Difficulty | Intermediate | Beginner-friendly |
| Best For | Experienced growers wanting size and strength | First-time growers wanting reliability |
If this is your first grow, we'd point you toward the Golden Teacher — it's forgiving, colonises reliably, and gives you a solid baseline to learn from. The PES Amazonian is the one you graduate to. It colonises faster, fruits bigger, and packs more psilocybin into those tall stems and broad caps. We'd pick the Amazonian over the Golden Teacher every time for a second or third grow — you'll appreciate the difference once you've got the basics down.
There's something deeply satisfying about opening a fruiting chamber and finding mushrooms that are genuinely tall. Most cubensis strains produce modest little fruit bodies — perfectly fine, but not exactly dramatic. The PES Amazonian changes that. When conditions are right — 28–30°C during colonisation, 23–27°C for fruiting — these mushrooms grow with a kind of urgency. The mycelium takes just 10–12 days to fully colonise your substrate, which is noticeably quicker than many other cubensis strains. And then the fruiting starts, and it doesn't stop easily. Expect several flushes, each producing a generous haul.
The potency is the other reason experienced growers keep coming back to this strain. According to research on Psilocybe cubensis, the principal active compounds are psilocybin and psilocin (PubMed, 2024), and the PES Amazonian is consistently reported to sit in the upper bracket for cubensis psilocybin content. That means you need less material per session, and the overall yield-to-potency ratio is excellent. You're not just growing big mushrooms — you're growing big mushrooms that deliver.
The one thing to watch: temperature control matters more with this strain than with something like a B+ or a Mexican. Drop below 23°C during fruiting and you'll see slower, stubbier growth. Keep it in the 23–27°C sweet spot and the Amazonian does what it does best — grows tall, grows fast, and keeps flushing.
Complete your setup with a Mondo Grow Kit if you want pre-colonised substrate ready to fruit — just add water and wait. For growers starting from scratch with this spore vial, a substrate bag and a still air box make the inoculation process significantly more reliable. Pair with a thermometer and hygrometer to nail those critical 28–30°C colonisation and 23–27°C fruiting temperatures.
Psilocybe cubensis contains several tryptamine alkaloids, with psilocybin and psilocin being the primary active compounds. According to research published in PubMed, "psilocybin, psilocin, baeocystin, norbaeocystin, and aeruginascin are tryptamines structurally similar to the neurotransmitter serotonin" (Stability of psilocybin and its four analogs, 2020). When ingested, psilocybin is converted to psilocin in the body, which then binds to serotonin receptors — primarily the 5-HT2A receptor.
Research into Psilocybe cubensis strains has shown meaningful variation in alkaloid profiles between different varieties. According to a 2025 study in PMC, cultivation parameters including temperature, substrate composition, and harvest timing all influence the final psilocybin content of the fruit bodies (Exploring Psilocybe cubensis Strains, 2025). This is why getting those temperature ranges right — 28–30°C for colonisation, 23–27°C for fruiting — isn't just about speed. It directly affects potency.
A separate study noted that Psilocybe cubensis extract demonstrated significant effects in preclinical models, with the principal active compounds confirmed as psilocybin and psilocin (PubMed, 2024). The PES Amazonian strain, with its above-average psilocybin content and robust fruiting characteristics, represents a good balance of yield and alkaloid concentration for the home cultivator.
One 10ml Mondo spore vial typically covers 2–3 substrate jars or bags, using roughly 3–5ml per inoculation point. If you're working with smaller jars (250ml), you can stretch it to 4–5 jars by using 2ml per jar, though colonisation may take a day or two longer.
At the recommended 28–30°C, full colonisation takes 10–12 days. That's faster than many cubensis strains. Drop below 28°C and it slows down noticeably — every degree matters during this phase.
Several flushes — typically 3–5 with proper care. Soak the substrate in cold water for 12 hours between flushes. Each subsequent flush tends to produce fewer but sometimes larger fruit bodies. The overall yield across all flushes is generous for a cubensis strain.
It's better suited to growers with at least one successful grow behind them. The strain itself isn't difficult, but the tall fruit bodies need headroom and the higher potency means you want to know what you're working with. Start with a Golden Teacher if this is your first time.
Keep it in the fridge at 2–8°C. Stored properly, the spores remain viable for months. Don't freeze it — ice crystals can damage the spores. Let the vial reach room temperature before inoculation and shake gently to redistribute the spores.
Some growers have reported heights of up to 30cm, though 15cm is a more typical average. Achieving those extreme heights requires optimal conditions — consistent 23–27°C fruiting temperature, high humidity around 90%, and enough vertical space in your fruiting chamber.
A spore vial stores spores in a liquid solution inside a sealed glass vial, which tends to preserve viability longer than a syringe. The Mondo vial includes a separate hypodermic needle you attach when ready. Functionally, the inoculation process is the same — the vial format just gives you better shelf life.
Mondo grow kits come pre-colonised and don't need spore inoculation — they're ready to fruit. This spore vial is for growers who want to inoculate their own substrate from scratch, giving you more control over the process and the ability to produce multiple batches from a single vial.
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.
