Mac n Jack R1 by Ethos Genetics

Mac n Jack R1 is a towering, insanely vigorous feminized photoperiod from Ethos Genetics that pairs a modern resin line with a true classic. Crossing Mac 1 with a 1994 Jack Herer, she delivers landrace lemon, incense, pine, and sandalwood terps on a plant with extremely high yield potential and a mind of her own. Ethos rates her Total Active Cannabinoids in the 25-30% range.

This is not a plant for a first grow. The Mac n Jack strain rewards seasoned growers who know how to steer explosive growth, and in the right hands she turns into a monster. If you are looking at Ethos seeds for a sativa-leaning heavyweight with a vintage soul, she belongs on the short list.

Lineage and the R1 Generation

The mother side is Mac 1, a cut famous for frosty, dense, resin-heavy flowers and a creamy citrus funk. The father side is a 1994 Jack Herer, an old-school haze-leaning legend known for sharp lemon, spicy pine, and an energetic, clear-headed high. Pairing them blends modern bag appeal with a timeless terpene profile and serious vigor.

The R1 tag means this is the first reversed-female feminized generation. Ethos reverses a selected female so she produces pollen, and the resulting seeds are all feminized. As a first-generation release she offers room for pheno hunting, while the explosive vigor, tall frame, and lemon-incense nose run consistently through the pack.

Aroma, Flavor, and Effect

Her aroma blends sharp landrace lemon with earthy, woody depth. Incense and pine give the profile an old-world, almost temple-like quality, and a smooth sandalwood note ties it together. Terpene tags for creamy, earthy, lemon-lime, pine, sour, and spices reflect how layered she is.

The flavor starts with zesty lemon peel and pine on the inhale, then turns woody and spicy on the exhale with a soft, creamy finish. A slow cure helps bring the sandalwood and incense forward.

Ethos classes her as a classic sativa, and the Jack Herer influence shows. Expect an energetic, clear-headed, creative lift with a light body. She is a daytime cultivar that suits focused work, music, long walks, and conversation.

Growing Mac n Jack R1 Indoors and Outdoors

She is insanely vigorous and can get out of control if not managed. The breeder’s key tip is to send her into flower earlier than a typical plant: she fills in nicely during the first month of bloom with strong vertical and lateral branching. Top early, use LST, and set a SCROG net before the flip to guide her stretch. Despite her speed, she stacks well for such a fast-growing plant.

Flowering runs 63 to 70 days or more, so allow time and let the trichomes tell you when she is ready. Her height runs tall with medium to long internodes, so plan for vertical space and keep lights at a safe distance during the stretch.

Ethos lists indoor and greenhouse as ideal environments, and she particularly loves indoors where her growth can be controlled. She can thrive outdoors but needs the full season to finish. Tagged for pro growers only, she is a rewarding challenge for those who know how to manage canopy, feeding, and timing.

Mac n Jack R1 Characteristics

Strain type	Feminized photoperiod
Generation	R1 (first reversed-female feminized generation)
Genetics	Mac 1 x 1994 Jack Herer
TAC	Up to 30% (25-30% range)
Effect	Classic sativa
Aroma/Terpenes	Landrace lemon, incense, pine, sandalwood
Yield	Extremely high
Flowering time	63-70+ days
Height	Tall, strong vertical and lateral branching
Grow level	Pro
Ideal environment	Indoor, greenhouse; outdoor with a full season
Best cultivation technique	Early flip, topping, LST, and SCROG

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