B+ Grow Kit | Psilocybe Cubensis

The B+ Cubensis: a Grower's All-Time Favourite

The B+ is the single most popular Psilocybe cubensis variety in cultivation worldwide. It earned that status through sheer reliability: the B+ tolerates temperature fluctuations better than almost any other cubensis, rarely stalls, and produces generous flushes even when conditions are less than perfect. Mature specimens develop a distinctive caramel-to-golden cap colour with a slightly wavy margin, sometimes reaching impressive diameters of 10 cm or more. The stems are thick and meaty, contributing to solid overall yields.

Why the B+ Outperforms

What sets the B+ apart from other cubensis varieties is its adaptability. Where a McKennaii or Copelandia might abort under suboptimal humidity, the B+ pushes through. It colonises the substrate quickly and evenly, with visible pinning often appearing within 10 to 14 days after initiating fruiting conditions. The ideal temperature range is 20-25 degrees C, but the B+ tolerates brief dips to 18 degrees C without significant yield loss. Most kits produce three to five flushes, with the first and second flush typically delivering the largest fruits.

This is a fully colonised, ready-to-grow kit. No spores, no inoculation, no specialist knowledge required. Add water, follow the included guide, and expect the first flush within two to three weeks. Store the kit refrigerated (2-8 degrees C) before use; shelf life is approximately three to six months when kept cool.

Stocking the B+ in Your Shop

The B+ is the kit most smartshop owners reach for first, and for good reason. Its reliability makes it the go-to recommendation for first-time growers, which translates to fewer customer complaints and more repeat purchases. Experienced growers come back to it too, because the yields are consistently strong. Pair it with a Heat Mat for year-round sales, especially during colder months when ambient temperature drops below the optimal range. See our full range of cubensis grow kits for variety.