B+ Magic Mushroom, the B+ is a relatively fast colonizer that fruits very easily and produces some large fruits in abundance. A hardy forgiving strain makes this an excellent choice for beginners as it grows easily in a variety of conditions. Colonization temperatures are 84/86 degrees F. Fruiting temperatures 74/78 degrees F. is optimal.   The B+ strain is still highly sought after due to the larger than average fruit sizes, some reportedly reaching up to 14 inches in length. When compared to other P. cubensis strains, the B+ is often considered a giant fruitier. Average fruit body heights reach six to eight inches with caps averaging one to three inches in diameter during later flushes. Very large fruits can be expected on more nutrient rich substrates such cased grains, manure, compost and straw.