Genetics: Purple Elephant x Chemdawg Sour Diesel | Strain Type: Hybrid Grape Stomper is a craft hybrid marijuana strain created by Gage Green Seeds. A complex cross between breeder JojoRizo’s Purple Elephant and breeder Elite Seeds’ Chemdawg Sour Diesel, Grape Stomper has quite the pedigree. The effects of this strain are felt most in the head, but a pleasant, tingly body sensation usually appears after a few minutes. As the name suggests, Grape Stomper also features a strong, fruity aroma similar to grape candy.