Sour Diesel, sometimes called Sour D, is an invigorating sativa-dominant strain named after its pungent, diesel-like aroma. This fast-acting strain delivers energizing, dreamy cerebral effects that have pushed Sour Diesel to its legendary status. Stress, pain, and depression fade away in long-lasting relief that makes Sour Diesel a top choice among medical patients. This strain took root in the early '90s, and it is believed to have descended from Chemdog 91 and Super Skunk.  It is now America's No. 4 favorite strain.