G13 x Haze by Mr. Nice Seeds is a legendary hybrid uniting two of the most influential cultivars in cannabis breeding history. The original G13, an elite government research clone, was preserved through inbreeding (IBL) to allow seed production and long-term availability. Paired with a pure Haze line, this hybrid expresses both immense potency and complex flavor. The plants display variable phenotypes ranging from dense Afghan-dominant structures to tall, haze-leaning expressions that benefit from careful EC management and experienced hands. Flowering indoors takes 9–11 weeks, while outdoor harvests finish from November to early December in the Northern Hemisphere and between May and June in the Southern Hemisphere. Yields are large under optimal sativa care, averaging 500–750 g/m², particularly in bio or hydro setups. Known for its medicinal properties and strong psychoactive effect, G13 x Haze remains a highly respected variety among advanced growers. It represents one of the key collaborations between Neville Schoenmakers and Shantibaba and a cornerstone in the evolution of high-potency hybrids combining Afghan structure with classic Haze clarity. Jonny Seeds’ honors this version for its historical significance, breeding potential, and preservation of original genetic depth.