B+ Magic Mushrooms: Origins and Genetics
The B+ strain is believed to have been developed or discovered in the 1990s by Mister G, a spore distributor who was based in Florida at the time. He is credited with distributing the spores more widely within the community. To add to the intrigue, there are rumors that the B+ strain is a hybrid of Psilocybe cubensis and Psilocybe azurescens; however, this may not be scientifically feasible.
What we can be sure of, however, is that the B+ is an incredibly popular and versatile Psilocybe cubensis strain. This is partly because this strain can grow under less-than-ideal conditions. This makes it an excellent choice for both novice and experienced growers. In addition, with the proper care and conditions, you can count on high yields and multiple flushes.
In terms of appearance, B+ magic mushrooms have sturdy, white stems that quickly turn blue when touched and processed. This usually indicates medium to high levels of psilocybin and psilocin. Furthermore, their large, caramel-to-golden brown caps often grow to several centimeters in diameter, making them visually appealing.
With a medium potency, B+ offers a pleasant yet impactful experience, ideal for those looking for an easy introduction to magic mushrooms. Its resilience and ease of cultivation make it a favorite among growers worldwide.
Acid Shroomz B+ Liquid Culture Development
The B+ strain was the first one we isolated and played a crucial role in our development process. We started the isolation by using a B+ spore print, from which we germinated the spores on agar plates. Soon after, we observed the initial growth of mycelium, and several colonies began to develop.
Through multiple agar transfers, we further isolated the strongest growth, and the culture eventually achieved consistency and purity, as evidenced by its uniform growth patterns. The resulting culture underwent extensive performance testing, which included assessing growth rate, yield, and resistance to contamination.
All of this effort resulted in a pure culture that can deliver exceptional results. It is now available via our B+ liquid culture syringes so that everyone can grow B+ mushrooms easily and independently.
Product Contents
Each B+ syringe contains 20 ml of live mycelium in a carefully formulated nutrient solution. The syringe is a high-quality B. Braun model for precise handling and inoculation.
Additionally, the product packaging contains two 70% isopropyl alcohol wipes, a sterile 16G syringe needle, and an instruction leaflet.
How to use a B+ Liquid Culture Syringe
For more information, check out our articles on using liquid culture syringes.
Safety Precautions and Handling
When handling the B+ liquid culture syringe, it is crucial to follow proper safety precautions to avoid contamination and ensure a successful growth process. Here are some general guidelines to keep in mind:
- Always handle the syringe in a clean and sterile environment.
- Wear powder-free nitrile gloves and a face mask to prevent contamination.
- Make sure there is little to no airflow in your workplace.
- Avoid touching the needle or the liquid culture directly to maintain sterility.
- Store the syringe in a refrigerator at 4-7°C to prolong its shelf life.
Optional accessories
Consider using a flow hood or still air box (SAB) for added sterility during the inoculation of substrates.
General Data
| Species | Psilocybe cubensis |
| Genetics | Unknown |
| Spores | Dark purple to brown |
| Applications | Microscopy, research, and taxonomy purposes. |
| Skill level | Beginner |
| Colonization speed | Fast |
| Potency | Medium |
Cultivation Data
| Spawn phase | |
| Suitable substrates | Sterilized grains like brown rice, rye, oats, millet, popcorn, or wild bird seed. |
| Colonization time | 9-14 days (2/3 filled liter jar / 27°C / shaken at 25-33% colonization). |
| Temperature | 25-27°C |
| Light | Low light or darkness. |
| Fruiting phase | |
| Suitable substrates | Manure, coco coir, CVG, or straw (adequately hydrated and heat-treated). |
| Temperature | 21-25°C |
| Relative humidity | 80-100% |
| Fresh air exchange (FAE) | Ensure good airflow without substrate drying. |
| Light | Indirect daylight or soft artificial light (roughly 6500 Kelvin). |
Notes
This product has a limited shelf life and is not eligible for return. For more information, see our page on reflection period and returns.









Very resilient even after slight contam and a lot of over-handling from my part. Elegant mature fruits.