Sour Diesel, or "Sour D," is a sativa-dominant hybrid strain known for its pungent, earthy, and citrusy aroma and energizing, cerebral effects. Its popularity stems from its ability to provide an uplifting, creative, and focusing high, often favored for daytime use to relieve anxiety, depression, and fatigue, though it's not ideal for insomnia. Its genetic lineage is debated but is often attributed to a cross between Chemdawg and Super Skunk.