Sour G R1 by Ethos Genetics is a photoperiod cross of Jet Fuel Gelato, Sour Diesel, and Marshmallow OG. It produces dark green, dense flowers with purple hints. Flowering within 63–70 days, it offers potent buds with TAC levels of 22–27%. Its unique terpene profile includes sweet florals, sharp gasoline and pine, with candy undertones. This cultivar requires extra defoliation to highlight its skunky influence and complex terpene profile. Sour G R1 is ideal for growers seeking robust growth and a distinctive flavor profile.