A hardy Psilocybe cubensis variety widely propagated for its cap size and broad environmental tolerance; attributed to the cultivator Mr. G in the 1990s.
§ 01Morphology
B+ produces unusually large fruiting bodies — caps routinely reach 50–100 mm, occasionally exceeding that under generous conditions — with a caramel-tan surface that pales toward the margin. The stipe is thick, fibrous, and pale, bruising blue-green on handling.
Flushes tend toward fewer, heavier specimens rather than dense clusters. Veil remnants on the stipe often persist as a faint annular zone, and spore deposits are a deep purple-black characteristic of the species.
§ 02Origin & Naming
B+ is widely attributed to a cultivator known only by the handle Mr. G, who stabilised and distributed the variety through hobbyist networks in the 1990s. The letter designation is informal; claims that the name abbreviates phrases such as "better plus" or "big plus" circulate in community lore but lack authoritative documentation.
The variety achieved broad distribution in North American and European collector circles through the 2000s and remains one of the most-traded P. cubensis genetics alongside Golden Teacher.
§ 03Cultivation Temperament
B+ is regarded as exceptionally forgiving and is frequently the first variety recommended to novice cultivators. It tolerates a wide incubation range (20–28 °C), colonises grain substrates rapidly, and fruits reliably on coco-vermiculite, CVG, and pasteurised straw preparations alike.
Contamination resistance is noted as above average for the species, though standard sterile technique remains essential. Flushes are typically slower to begin than Golden Teacher but compensate with larger individual specimens.
§ 04Safety Profile
As with all psilocybin-containing species, B+ carries significant contraindications. Psilocybin is a serotonergic compound and interacts with a range of medications and mental-health conditions.
⚠ Contraindications
Not suitable for individuals with personal or family history of psychotic disorders, schizophrenia, or bipolar I; those taking SSRIs, MAOIs, or lithium; pregnant or breastfeeding persons; or those with unmanaged cardiovascular conditions. Always review the full safety codex before use.