The Leaf Index
Vol. IA field guide to cannabis cultivarsleafly.cc
No. 4355Sativa

King Jack

Jack Herer × King Louis XIII OG or King's Kush

King Jack is a hybrid strain developed by various breeders, typically featuring Jack Herer as a primary component, enhanced with kush or OG genetics. This cross aims to combine the uplifting, cerebral qualities of Jack Herer with a denser structure and a more grounded, kush-like presence, resulting in a balanced experience suitable for daytime use. Due to its breeder-dependent nature, expect some variation between different phenotypes and batches.

EffectsEnergetic Cerebral Calm Focus
May help withStress
AromaPineCitrusHerbalEarthyJuniperForest FloorPepperCedarFuel

Appearance

King Jack often presents as medium to large, spear-shaped buds with tighter calyx stacking than traditional sativas, contributing to a dense feel and appealing visual presentation. The sugar leaves are typically minimal, with elongated calyx tips that can sparkle with trichomes. Bud coloration ranges from lime to deep green, sometimes displaying lavender hues on the sugar leaves under specific conditions, and pistils mature from light apricot to copper. The trichome coverage is usually substantial, giving the buds a frosted appearance.

Aroma & Flavor

The aroma of King Jack is characterized by a prominent pine and citrus scent, often with notes of lemon-lime and eucalyptus, layered over a foundation of kushy herbs and forest floor undertones. Upon grinding, a rush of sweet-sour citrus, crushed pine needles, and a peppery warmth is released. Some variations may exhibit a faint cherry-like note. The flavor profile mirrors the aroma, delivering a bright, pine-citrus zest with eucalyptus coolness on the inhale, followed by pepper-kush spice, cedar, and a clean, resinous finish on the exhale, often described as creamier and more minty-pine than pure Jack Herer.

Effects

King Jack is generally recognized for providing an energetic and cerebral experience, promoting focus and creativity without inducing excessive jitters. It balances uplifting mental clarity with a calming sensation, offering a sense of grounded comfort. This hybrid is often chosen for its ability to support productive activities while maintaining a sense of ease, making it suitable for daytime consumption. The combination of THC and terpenes can lead to a pronounced effect, so moderation is advised for new users.

Terpenes & Cannabinoids

King Jack typically tests between 18-26% THC, with CBD levels usually below 1%. Total terpene content often ranges from 1.5-3.0% in well-cultivated samples. Dominant terpenes commonly found include Myrcene, Limonene, Caryophyllene, Linalool, Pinene, Terpinolene, and Ocimene, contributing to its complex aroma and flavor profile. The specific cannabinoid and terpene profile can vary based on the breeder and cultivation methods, influencing the overall effects and entourage potential.

Origins & Lineage

King Jack is a breeder-specific hybrid name, most commonly a cross involving the sativa-dominant Jack Herer. The other parent typically contributes an OG or Kush influence, such as King Louis XIII OG or King's Kush. These crosses aim to modernize Jack Herer by adding density, bag appeal, and a more grounded, kush-like character while preserving its uplifting and creative cerebral effects. The specific lineage can vary, so verifying the breeder's pedigree is recommended.

Frequently asked questions

What is the THC content of King Jack?
King Jack typically tests between 18-26% THC.
What are the dominant terpenes in King Jack?
Common dominant terpenes include Myrcene, Limonene, Caryophyllene, Linalool, Pinene, Terpinolene, and Ocimene.
What kind of effects does King Jack provide?
King Jack is known for energetic, cerebral, and creative effects, often accompanied by a sense of calm and focus.
Is King Jack suitable for beginners?
While King Jack offers balanced effects, its potency can be significant. Beginners should start with a low dose and titrate slowly, especially with phenotypes leaning towards the OG side.