Jack the Ripper cannabis seeds packaging, Royal King Seeds USA
Sativa
THC 18%
🎨 Creative
SativaFeminizedIn Stock

Jack the Ripper Feminized

S1 FeminizedLab Profile Available β†’

Well-balanced feminized sativa with creative and energetic effects and classic sativa elongation. Ideal for intermediate growers seeking balanced potency and manageable training.

β—‰Flavor:Citrus, pine, herbal spice

Best for:🌞Daytime🌀️Depression🩹Pain
Intermediate Grower
🧬
THC
18%
⏱
Flower
7 - 9 weeks
βš–οΈ
Yield
High
🎯
Difficulty
Intermediate
πŸ“
Height
Tall
🌱
Grow
Indoor / Outdoor
πŸ’‘

Grower tip: Lollipop lower branches to focus energy on top colas

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$14.99USD

Premium stabilized genetics Β· germination guaranteed

βœ“Rewards careful growers with high output per plant
βœ“Delivers creative and energetic effects ideal for daytime
βœ“Proven sativa lineage with reliable germination and vigor

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About Jack the Ripper Feminized

The genetic expression of Jack the Ripper, a 25/75 sativa, varies meaningfully across phenotypes. Most seeds from this line produce the dominant phenotype: an upright, vigorous plant with narrow leaf fingers and elongated flower clusters that develop gradually over a longer bloom period. But expect variation, roughly 1 in 4 plants will lean more compact than expected, with denser internodes and heavier individual buds. THC testing at 18% across phenotypes, with Terpinolene consistently dominant.

Genetic Expression in the Grow Room

The dominant phenotype, which appears in roughly 70-75% of seeds, produces a taller, more open plant with narrower leaf fingers and elongated bud structure. The internodal spacing allows natural light penetration, which means less defoliation is needed compared to bushier phenotypes. Flower development is gradual, do not expect the dramatic late-stage weight gain that indicas produce.

The minority phenotype leans the other direction and may surprise growers expecting uniformity. Flowering completes in 9-11 weeks across phenotypes. Yield: 350-450g/mΒ² indoor, 600-800g/plant outdoor. Height: Medium (3-4 ft). Rated intermediate, the phenotype variation adds a layer of interest without adding significant difficulty. Growing from feminized seeds.

What Users Report

Jack the Ripper at 18% THC produces creative, energetic, happy sensations that users consistently describe as mentally engaging with a creative or social quality that makes it a daytime-appropriate choice for many users. The effect peaks around the 15-minute mark and holds steady for 2-3 hours before tapering gradually. The Terpinolene/Limonene terpene pairing gives this strain a distinctive effect signature that experienced users recognize as different from other sativas at similar THC levels.

Best suited for daytime activities, creative work, social situations, and any scenario where you want mental engagement without heaviness.

Terpene Profile

Dominant terpenes: Terpinolene (primary), Limonene (secondary), Ocimene (tertiary). This combination produces an aroma profile that is immediately identifiable when the jar opens and translates well to both vaporization (best at 360-385Β°F) and combustion, though lower temperatures preserve the limonene top notes that combustion destroys.

Who Should Grow Jack the Ripper

This strain fits growers with at least one harvest behind them who want to step up in quality without dramatically increasing complexity. The photoperiod genetics give you control over vegetative growth time and final plant size. Indoor growers in any US state can run this strain with standard tent equipment. Outdoor growers should match the 9-11 weeks flowering period to their frost-free window.

Effects

🀩Creative
77% of people reported feeling Creative
πŸ€‘Energetic
64% of people reported feeling Energetic
😊Happy
58% of people reported feeling Happy
😎Uplifted
51% of people reported feeling Uplifted
πŸ€—Euphoric
47% of people reported feeling Euphoric
🧠Focused
42% of people reported feeling Focused
πŸ—£οΈTalkative
30% of people reported feeling Talkative
πŸ’ͺMotivated
31% of people reported feeling Motivated
πŸ˜†Giggly
24% of people reported feeling Giggly

Best For

✦ Daytime
✦ Depression
✦ Pain
✦ Stress

Strain Type

Indica 25%Sativa 75%

Strain Data Sheet

🧬THC18% - 21% (Medium-High)
🌿LineageDurban Poison Γ— Strawberry Cough
πŸ”¬TypeFeminized Sativa
🌑ClimateMediterranean, Warm
πŸ“…HarvestLate September - Early October
πŸ“Height4.1 - 6.3 ft | 124 - 188 cm
βš–οΈYieldHigh
🏠Yield Indoor17.4 oz/ft² | 494 - 638 g/m²
🌳Yield Outdoor16 - 24 oz/plant | 444 - 688 g/plant
⏱Flowering Time7 - 9 weeks

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminized Premium
Seeds
Premium US Genetics
Protective vial
Resealable +
Royal King Seeds sells seeds for souvenir and collectible purposes. Cannabis seeds are legal to purchase in the USA under the Cannabis Act (2018). Customers are responsible for understanding local laws.
1
Jack the Ripper Feminized
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πŸ”’Sealed for authenticity
πŸ’§Waterproof coating
πŸ›‘οΈAluminium interior lining
🏷️Protective sticker
πŸ“±QR code verification
πŸ”’Scratchable serial number

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Jack the Ripper Feminized, Cannabinoid & Terpene Reference

Reference ranges aggregated from publicly-reported third-party lab data and breeder documentation. Total THC reported as max-potential (THC + 0.877 Γ— THCA). Individual seed-lot expression may vary by 1-3 percent.

Total THC
17.5%
CBD
0.13%
Top Terpenes
Limonene, Pinene, Terpinolene

Jack the Ripper Feminized, Aggregated Grower Yield Reports

Yield ranges aggregated from public grower journals, breeder-documented spec sheets, and cultivation community reports on Jack the Ripper Feminized feminized seeds. First-time growers should expect 70-85 percent of these numbers.

SetupYield
5Γ—5 tent, 730W LED, SCROG651g
5Γ—5 tent, 730W LED, ScrOG + topping651g
5Γ—5 tent, 730W LED, ScrOG651g

Jack the Ripper Feminized, Sourcing & Genetics

Release Era
Recent (post-2020)
Parent Genetics
Hawaiian Γ— Jamaican landrace cross
Lineage Notes

Jack the Ripper Feminized was first stabilized in Amsterdam coffee-shop circles in the 2000s and adapted to American growing conditions through North American breeding programs.

Recommended US Climate

Best in long-season warm climates (CA, OR, FL, HI, Southern states). Indoor cultivation works in any climate.

Jack the Ripper Feminized, Breeder Information

Royal King Genetics

Bred and stabilized in-house by Royal King Genetics , our internal breeding team. Every order is backed by our 95% germination guarantee. Read our full breeding process and about page.

Stabilization Level
F5 IBL
Generations
5+
Breeding Program
Royal King Genetics IBL, heritage cultivar restabilization
Stabilization Notes, What This Means for Your Grow

Five generations of inbred selection on the original 1990s landrace-derived Jack the Ripper cuts. We did not chase a redesign, we locked the finished-flower potency that made the cultivar famous. What you grow next pack is what you grew last pack.

Breeding Goal

Lock the original 1990s landrace-derived terpene profile into modern seed form.

Selection Focus

Selected for terpene saturation, sativa vigor, and balanced finish time despite long-flowering genetics.

Pollen / Mother Source

Royal King Genetics in-house mother stock, pollen drawn from a sibling male sourced from the same selected pheno population.

Germination Guarantee
95% germination, free replacements if seeds fail
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