- Jack the Ripper is a hybrid Sativa strain originating from USA, dating back to 2004.
- Lab tests place its THC content at approximately 17-24%.
- Its lineage runs through Jack Herer × Space Queen, making it a key reference point for breeders.
- 2 documented strains descend from Jack the Ripper, including modern market favourites.
- Dominant terpenes: Terpinolene, Limonene, Myrcene — driving its signature aroma and effects.
About Jack the Ripper
Jack the Ripper is a fast-flowering sativa created by the influential breeder Subcool of TGA Genetics, crossing Jack Herer with Space Queen. It produces a powerful lemon-lime citrus aroma with sweet candy undertones and delivers a sharp, intensely cerebral high that is euphoric and creative yet clear-headed. Its name references both its dagger-like mental edge and its (very) fast finish. JTR won multiple awards in the late 2000s and achieved legendary status among sativa lovers.
Flavor Profile
The Story & Lineage Origin
Jack the Ripper was released by TGA Genetics in 2004-2005 and quickly became one of the most decorated sativas in modern breeding, winning multiple Cannabis Cups. Its influence extends into countless hybrid projects.
Leafly lists it among the 100 best weed strains of all time.
Seeds & Availability
Jack the Ripper was bred by Subcool, TGA Genetics. Official seed packs from the breeder and authorized retailers sell out fast and are frequently counterfeited — verify pack authenticity (breeder logo, batch codes) before buying, and expect phenotype variation between packs.
Genetic Background
Cross of Jack Herer and Space Queen (Romulan × Cinderella 99)
Phenotypes & Cultivars
Jack the Ripper is available in the following phenotypes and cultivars:
Terpene Profile
Jack the Ripper is dominated by Terpinolene, Limonene, Myrcene. These compounds shape the strain's aroma, flavor, and reported effects.
Known Offspring
Strains that descend from Jack the Ripper:
Frequently Asked Questions
What is the THC percentage of Jack the Ripper?
Jack the Ripper typically tests at 17-24% THC content in lab results, though actual potency varies by phenotype, growing conditions, and harvest. As a sativa-leaning strain, the THC delivers an uplifting cerebral experience.
Is Jack the Ripper a sativa or indica?
Jack the Ripper is a sativa cannabis strain (Sativa). Bred from Jack Herer × Space Queen, its effects lean toward an uplifting, cerebral sativa experience. Users report: Energetic, euphoric, creative, focused, cerebral.
Jack the Ripper strain review — what to expect
Jack the Ripper is known for Energetic, euphoric, creative, focused, cerebral. Subcool's celebrated Jack Herer × Space Queen sativa with electric lemon-lime flavors and a razor-sharp, energetic high. The aroma profile features lemon-lime, citrus, sweet candy, pine, spice. Dominant terpenes: Terpinolene, Limonene, Myrcene.
What is Jack the Ripper crossed from?
Jack the Ripper was bred from Jack Herer × Space Queen. Detailed ancestry: Cross of Jack Herer and Space Queen (Romulan × Cinderella 99). This cross produces the strain's characteristic effects, terpene profile, and growth pattern.
What terpenes are in Jack the Ripper?
Jack the Ripper is dominated by Terpinolene, Limonene, Myrcene. These aromatic compounds shape the strain's signature flavor, aroma, and contribute to its reported effects through the entourage effect.
How much does Jack the Ripper yield and how long does it flower?
Jack the Ripper has a flowering time of 8-9 weeks and produces high yields. Plants reach medium to tall height, making it better suited for larger grow spaces with vertical room.
What is Jack the Ripper and where does it come from?
Jack the Ripper is a sativa cannabis strain that originates from USA. It belongs to the 2000s era of cannabis genetics. Subcool's celebrated Jack Herer × Space Queen sativa with electric lemon-lime flavors and a razor-sharp, energetic high.
What is the genetic background of Jack the Ripper?
Jack the Ripper has the following ancestry: Cross of Jack Herer and Space Queen (Romulan × Cinderella 99).
Is Jack the Ripper indica or sativa?
Jack the Ripper is a sativa cannabis strain. Learn how in indica vs sativa classification differs in our strain guide.
What does Jack the Ripper smell and taste like?
Jack the Ripper has a Lemon-lime, citrus, sweet candy, pine, spice aroma, with flavors described as Lemon-lime, citrus, sweet, pine, tea. Its dominant terpenes are Terpinolene, Limonene, Myrcene.
What are the effects of Jack the Ripper?
Users report Energetic, euphoric, creative, focused, cerebral. As a sativa-dominant strain, it leans toward uplifting cerebral effects.
How strong is Jack the Ripper? (THC & CBD content)
Jack the Ripper typically tests at 17-24% THC with low CBD. Strength always varies by grow and harvest.
Medical Applications
Jack the Ripper is commonly associated with: