Sour Pebbles a sativa cross between Alien Diesel and Fruity Pebbles. Its aroma balances sweet and sour, passing on flavors from both sides of its family. Sour Pebbles is a good choice for tokers who want potent cerebral effects and a truly powerful case of the munchies . The unique morning aroma is sour, with hints of fruit and breakfast cereal. The flavor is also sour, but comes with notes of candy and gasoline.