Why choose the Golden Teacher XL?
Golden Teacher is the world’s most popular magic mushroom strain for good reason — and in the 2100 ml XL format, you get significantly more of what makes it great. Nearly double the colonised substrate means bigger flushes, larger individual mushrooms, and enough yield for multiple sessions from a single kit.
If Golden Teacher is your go-to strain, the XL is the obvious upgrade. Golden Teacher psilocybe cubensis was reportedly discovered growing wild in Florida during the 1980s and has since become the benchmark for home cultivation.
The mushrooms are recognised by their broad, elegant caps (20–60 mm) that transition from rich brown to a distinctive golden hue as they mature, set on sturdy stems (40–140 mm) that bruise blue-green. In the XL kit, the greater nutrient reserve produces noticeably larger caps and thicker stems than the standard 1200 ml size.
The experience is insightful and introspective: clear-headed, gently visual, and with a profound, reflective depth. Golden Teacher is the strain most recommended for first-time users because of its balanced, forgiving nature — potent enough to be meaningful yet manageable at standard doses.
Growing the Golden Teacher XL
The method is identical to the 1200 ml kit — same grow bag, same steps, same temperature. Golden Teacher colonises at a moderate pace, so the XL kit may take a few extra days before you see the first pins compared to faster strains like Cambodian or Thai.
This is normal — patience pays off. Keep the temperature steady at 23 °C and expect pinning within 12–18 days. The XL typically delivers an extra flush or two, so keep soaking and restarting until the kit stops producing.
Golden Teacher — strain specifications
| Species | Psilocybe cubensis |
| Origin | United States (likely Florida, 1980s) |
| Difficulty | Easy |
| Cap | 20–60 mm, brown maturing to golden with yellow speckles |
| Stem | 40–140 mm, sturdy, bruises blue-green |
| Spores | Dark purple-brown, 11.5–17 × 8–11 µm, subellipsoid, basidia 4-spored |
| Potency | Average to above average |
| Optimal temperature | 23 °C (never below 20 °C) |
Frequently asked questions
What’s the difference between the 1200 ml and 2100 ml XL kit?
Same strain, same method, bigger box. The XL contains nearly double the colonised substrate, which translates to higher yields (400–800 g vs. 200–400 g), larger individual mushrooms, and typically an extra flush or two. For Golden Teacher — the strain most people come back to — the XL means more sessions from a single kit.
What yield can I expect from this 2100 ml XL kit?
The Golden Teacher XL typically produces 400–800 g of fresh mushrooms across multiple flushes. Golden Teacher is a consistent, reliable producer — not the absolute highest yielder in the range, but dependable flush after flush. Actual yield depends on temperature, humidity, and hygiene during the grow.
I’m a first-time grower — should I start with the standard or XL?
If you’ve never grown before, the 1200 ml standard kit is the safer starting point — it’s more forgiving if you make small mistakes and you’ll learn the process with less at stake. Once you’ve completed a successful grow and know the routine, the XL is the natural next step. That said, the method is identical — confident beginners can absolutely start with the XL.
Be sensible
Check out the responsible use page for more information on do’s and don’ts.






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