Sig Sour, also known as Sig Sour XXL, Sig Sour XXL Auto, Auto Sig Sour, or Sig Sour Auto, is a sativa-dominant hybrid born from crossing Sour Diesel with an unknown Ruderalis hybrid. The result is a plant that grows quickly, earning favor with breeders and patients who want rapid relief. Its buds are fluffy and airy, oversized triangle-shaped and bright neon green with rich golden-amber undertones, accented by thin orange pistils and a shimmering glaze of sparkling trichomes.
Its effects arrive as the exhale carries a rush of vibrant energy that invites movement, while creative ideas spark and mental clarity sharpens. The high tends to be long-lasting, uplifting moods and fueling focus, making it a popular choice when inspiration or productivity is desired. With THC typically around 27–28%, Sig Sour is often used by experienced users to address fatigue, chronic stress, depression or mood swings, chronic pain, ADD or ADHD, and headaches.
The flavor pairs citrus and lemon with subtle sweetness and spicy diesel, and the aroma follows with a heavier lemony diesel presence that grows more potent as the nugs burn. In scent and taste, notes of citrus, lemon, sour, spice and sweet mingle with earthy and diesel hints. The strain is broadly characterized as around 80% sativa, with roughly 19% indica and 1% ruderalis, a composition that supports its energetic, focused profile without losing a hint of complexity.