Some of the strongest sativa strains include Sour Diesel and Haze varieties. Sour Diesel is known for its energizing and dreamy cerebral effects and pungent aroma. At the same time, Haze strains are appreciated for their long-lasting, energetic highs and rich, citrusy flavors. These strains are famous for their high THC levels, making them highly favored among cannabis connoisseurs.