Siberian Ruderalis by Khalifa Genetics is a hardy autoflowering landrace from the Lake Chebarkul region in the southern Ural Mountains, where villagers traditionally use it to produce flavorful, high-CBD charas. This semi-wild variety exhibits great vigor, resilience, and rapid flowering, thriving in extremely cold and nutrient-poor environments. It is believed to have originated from a historical hybridization between local Ruderalis and neighboring Kazakh landraces, explaining its pungent citrus aroma, high trichome production, and mild psychoactivity. The plants automatically begin flowering 2–3 weeks after germination and continue to grow through flowering, reaching 120–190 cm in height. Over 25% of plants display mauve or purple hues near harvest. Selected and refined over four generations of controlled open pollination, this strain has been adapted for indoor cultivation by reducing weak and hermaphroditic plants while maintaining high genetic diversity. Originating from regions with winter temperatures averaging –21 °C, the seeds have a tough, waterproof shell and require pre-germination techniques such as cold treatment or gentle cracking for optimal success. Siberian Ruderalis is a very light feeder, requiring minimal nutrients to flourish in poor soil but benefits from light feeding during the second half of its life cycle. With THC levels between 0.1–1% and CBD between 4.5–9%, this cultivar offers breeders a valuable genetic resource for developing hardy XXL autoflowering CBD strains. Traditionally used by local villagers to make high-CBD charas, this landrace represents a living expression of cannabis adaptation and survival in one of the planet’s harshest environments.