Colin OG Rbx by Ethos Genetics

Colin OG Rbx is a showpiece for growers who want color and classic OG funk in the same plant. Ethos Genetics built it on Grateful Dawg, the Dead Head OG cut from Irie Genetics, backcrossed through a Grateful Dawg x The White line, and the result is a feminized photoperiod that turns shades of purple from nearly black to vibrant magenta as it ripens.

The Colin OG Rbx strain smells like classic sour OG with hints of grape and cherry, and it carries a heavy, long-lasting effect. Ethos Genetics lists a TAC of 27-30%.

She is one of the Ethos seeds that especially loves the outdoors, where her strength and vigor shine and the late-season color show really takes off. Indoors she performs well too, with a little extra attention to canopy management.

Expect an average yield that can grow into large harvests of flower and oil once she is dialed in, with a bloom of about 63-70 days.

Lineage and Breeding

Grateful Dawg is the Dead Head OG cut from Irie Genetics, a Chem and OG descendant prized for loud sour fuel and potency. The White adds frost, density and structure. By crossing Grateful Dawg with a Grateful Dawg x The White plant, Ethos Genetics pushed the line back toward the Dead Head OG mother while keeping some of The White’s resin and build.

The Rbx tag stands for reversed backcross: a reversed female was used to cross the line back toward a parent, producing feminized seeds. For growers, that means a strong expression of the Grateful Dawg traits and more consistency than a simple outcross, with every seed growing into a flowering female.

Aroma, Flavor and Effect

The nose is classic sour OG, sharp and fuel-tinged, with sweet notes of grape and cherry layered on top. Listed terpene families include acrid chem, berry, floral, gassy, incense, sandalwood and sour, which gives the smoke an unusually complex mix of fuel, fruit and woody spice.

The effect is heavy and long lasting, leaning toward a classic indica or hybrid experience. Expect a calm, relaxing body feel paired with a mellow head, a good match for evenings, movies and unwinding at the end of a busy day.

Growing Colin OG Rbx Indoors and Outdoors

Colin OG Rbx grows short to medium in height with fairly strong lateral branching and short to medium internodes. The stockier phenotypes respond well to regular defoliation, which opens up the interior and helps light reach the lower sites. Topping once and spreading the branches with LST keeps the canopy even indoors.

She finishes early in terms of maturity but keeps growing and coloring up, so watch the trichomes rather than the calendar. The breeder lists about 63-70 days of flowering. Cooler night temperatures in the last weeks help bring out the deepest purple tones.

Outdoors, she is strong and vigorous and handles the season well, rewarding growers with dramatic late-season color. In greenhouses she grows equally well. Once dialed in, she can produce large yields of both flower and oil, making her a fine choice for growers who also press or wash.

Colin OG Rbx Characteristics

Strain type	Feminized photoperiod
Generation	Rbx (reversed backcross)
Genetics	Grateful Dawg x (Grateful Dawg x The White)
TAC	27-30%
Effect	Classic indica to hybrid, heavy and long lasting
Aroma/Terpenes	Classic sour OG, grape, cherry
Yield	Average, larger once dialed in
Flowering time	63-70 days
Height	Short to medium, fairly strong lateral branching
Grow level	Intermediate to pro
Ideal environment	Indoor, greenhouse and outdoor; loves outdoors
Best cultivation technique	Topping, LST and regular defoliation

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