Watermelon Diesel Flower Strain Type: Indica Dominant Hybrid Lineage: Cross between Watermelon Zkittlez x Strawberry Diesel Effects: Its high may set in quick, delivering a powerful, head-rushing euphoria. With its heavy effects, Watermelon Diesel is best reserved for the end of the day. Aromas/Flavors: A sour, fruity aroma and flavor profile that is mouthwateringly scrumptious.