Sour Diesel, sometimes called Sour D is an invigorating happy and uplifting sativa-dominant strain named after its pungent, diesel-like aroma. This fast-acting strain is a top choice among medical patients with its 90:10 sativa/indica ratio. With THC levels between 22-26%, Sour Diesel is definitely one of the world’s strongest strain. Sour Diesel is greatly used for depression, nausea, ADHD and inducing hunger. This strain has a dark green-brown and frosty in appearance due to its many trichomes.