PE+ is a cross of B+ and Penis Envy originally developed by Rarebreed Genetics, seeking to pair the productivity and resilience of B+ with the potent but more stubborn PE. The result is a long, thick stemmed tub filler with intermediate growth speed, improving on the size and potency of the B+, and without all the difficulty that PE is known for. This culture comes from the original F6 release, which was supposed to have been a major event but ended up happening quietly when the creators had a falling out and disappeared from the scene.