Spore Syringes
by Mondo
The Mondo PES Amazonian spore syringe is a ready-to-use inoculation tool packed with Psilocybe cubensis spores from one of the fastest-colonising strains in cultivation. PES Amazonian — short for Pacifica Exotica Spora Amazonian — has earned its reputation among growers for aggressive mycelial growth, generous yields, and a potency that sits comfortably above average cubensis varieties. Each syringe contains 20ml of spore solution, enough to inoculate multiple jars or bags of substrate and get a couple of separate grows underway.
PES Amazonian is one of those strains that keeps showing up in grower forums for good reason — it's forgiving, fast, and productive. Colonisation times tend to run shorter than many other cubensis varieties, which means less time waiting and a smaller window for contamination to take hold. The mushrooms themselves grow tall with thick stems and broad caps, and the flushes tend to be heavy. If you've grown B+ or Golden Teacher before and want to step up to something with more vigour and a bit more kick, PES Amazonian is the logical next move.
Mondo has been producing spore syringes and grow kits out of the Netherlands for years, and their syringes are consistently clean. The spore solution is prepared in a sterile environment and sealed in a luer-lock syringe, so you're not fighting contamination before you've even started. That said — and this is the honest bit — no spore syringe is a guaranteed harvest. Your sterile technique, substrate quality, and growing conditions do 90% of the work. The syringe gives you viable genetics. The rest is on you.
The Mondo PES Amazonian spore syringe ships as a single unit containing everything you need for inoculation. No extra purchases required just to get spores into substrate.
| Component | Detail |
|---|---|
| Spore syringe | 20ml, luer-lock tip |
| Needle | Sterile, individually wrapped |
| Strain | Psilocybe cubensis PES Amazonian |
| Origin | Amazonian region (South America) |
| Spore concentration | High — visible spore clumps in solution |
| Inoculations per syringe | Approximately 6–12 jars (2–3ml per jar) |
| Storage | Refrigerate at 2–8°C, use within 12 months |
| SKU | SH0120 |
Complete your cultivation setup with a Mondo grow kit or a bag of pre-sterilised grain substrate — saves you the pressure cooker step and cuts your contamination risk dramatically. A still air box or laminar flow hood pairs well with any spore syringe work, and sterile latex gloves are non-negotiable.
We've seen growers lose entire batches to one ungloved hand or a syringe that was dodgy from the start. Contamination is the number one killer of home mushroom grows, and it almost always traces back to the inoculation step. A poorly prepared spore syringe — one with bacterial contamination hiding in the solution — can turn your carefully sterilised grain jars into a green and orange mess within a week. You won't know until the damage is done, and by then you've wasted substrate, time, and patience.
Mondo's syringes are prepared under laboratory conditions, which gives you a clean starting point. The luer-lock tip means the needle stays firmly attached during inoculation — no wobbling, no accidental disconnection, no exposed solution. The 20ml volume is generous compared to the 10ml syringes some suppliers offer, giving you enough spore solution for 6–12 inoculation points depending on how heavy-handed you are with each jar. At 2–3ml per injection site, that's a solid number of jars from a single syringe.
The one limitation worth mentioning: spore syringes colonise slower than liquid culture syringes. With a spore syringe, the spores need to germinate first before mycelium starts spreading. Liquid culture contains living mycelium that hits the ground running. If speed is your absolute priority, liquid culture is faster — but spore syringes store longer and give you genetic diversity, which matters if you're selecting for strong performers across multiple grows.
Inoculating grain substrate with a spore syringe is straightforward, but sterile technique is everything. One shortcut here and you're growing trichoderma instead of mushrooms. Follow these steps and you'll give your PES Amazonian spores the best possible start.
Mondo PES Amazonian spore syringes keep best in the fridge at 2–8°C. At that temperature, spore viability holds for up to 12 months. Don't freeze them — ice crystals can damage spore cell walls and reduce germination rates. Keep the syringe in its sealed packaging until you're ready to use it, and avoid exposing it to direct light or heat. If you're only using part of the syringe, recap the needle, wrap it in foil, and return it to the fridge. Use the remainder within a few weeks for best results.
Choosing a strain comes down to what you want from the grow. Here's how PES Amazonian stacks up against two other popular options in the Mondo spore syringe range.
| Characteristic | PES Amazonian | Golden Teacher | B+ |
|---|---|---|---|
| Colonisation speed | Fast | Moderate | Moderate to fast |
| Yield | High | Moderate to high | High |
| Potency | Above average | Moderate | Moderate |
| Fruit body size | Large, tall stems | Medium, broad caps | Large, meaty |
| Contamination resistance | Good | Good | Very good |
| Best for | Growers wanting speed and potency | First-time growers | Growers wanting reliability |
If Golden Teacher is the sensible first car, PES Amazonian is the upgrade you get once you know how to drive. B+ sits somewhere in between — bulletproof and generous, but without the same kick. We'd pick PES Amazonian over both if you've got at least one successful grow under your belt and want something with more character.
We've been selling spore syringes since the early 2000s, and PES Amazonian has been a consistent top seller the entire time. The questions we get most often are about contamination — and the answer is almost always the same: it's not the syringe, it's the technique. Invest in a still air box (you can make one from a plastic storage tub for under a tenner), use 70% isopropyl alcohol on everything, and don't rush the process. Growers who take sterile technique seriously report colonisation starting within 5–7 days with PES Amazonian. Those who cut corners report green mould within 5–7 days instead.
One thing we've noticed over the years: PES Amazonian fruits tend to come in dense clusters rather than evenly spaced individual mushrooms. That means your first flush can look absolutely packed — but it also means you need to harvest promptly before the caps open fully and drop spores everywhere, which can stall your subsequent flushes. Harvest when the veil beneath the cap is just starting to tear. Don't wait for the caps to flatten out.
A PES Amazonian spore syringe is a sterile syringe filled with 20ml of water containing Psilocybe cubensis PES Amazonian spores in suspension. You inject this solution into sterilised grain substrate, where the spores germinate and produce mycelium that eventually fruits into mushrooms.
At 2–3ml per injection point, a single 20ml Mondo spore syringe gives you roughly 6–12 inoculations. That's enough to get a couple of separate grows going from one syringe.
Expect visible mycelium within 5–10 days of inoculation at 24–27°C. Full colonisation of a standard grain jar typically takes 2–4 weeks. PES Amazonian is one of the faster-colonising cubensis strains.
If you're preparing your own grain substrate, yes — a pressure cooker is the only reliable way to sterilise it. If you buy pre-sterilised substrate bags or jars with injection ports, you can skip that step entirely.
Keep it in the fridge at 2–8°C in its original sealed packaging. Don't freeze it. Stored properly, Mondo spore syringes remain viable for up to 12 months.
A spore syringe contains dormant spores that need to germinate before mycelium forms. A liquid culture syringe contains living mycelium, so colonisation starts faster. Spore syringes store longer and offer more genetic diversity — liquid cultures are quicker but more perishable.
Green means contamination, almost certainly Trichoderma mould. Don't open the jar indoors. Bin it and review your sterile technique — the cause is usually insufficient sterilisation of substrate or unclean air during inoculation.
It's a solid second strain. Golden Teacher or B+ are more forgiving for a first attempt, but PES Amazonian isn't difficult — it just rewards good technique with faster colonisation and bigger yields. If your sterile game is tight, go for it.
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.
