RK
Jelly Roll cannabis seeds packaging β€” Royal King Seeds the UK
Indica
THC 16%
🎨 Creative
IndicaFeminizedIn Stock

Jelly Roll Feminized

Feminized PhotoperiodSee Lab Report β†’

Jelly Roll Feminized seeds. A indica cultivar at 16% THC delivering relaxed, euphoric, creative. Grow figures from named sources.

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Β£9.35
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About Jelly Roll Feminized

Germination & Early Veg (Days 1-14): Jelly Roll seeds typically crack within 48 hours using the damp paper towel method and break soil by around day 3. Early growth was squat and vigorous β€” broad cotyledons followed by wide, dark-green fan leaves typical of the indica heritage. By day 14 expect around four established nodes with tight internodal spacing. Damping off is uncommon at around 70% relative humidity during this phase.

Vegetative Growth (Weeks 3-6): Lateral branching exploded after topping at the fourth node. The plant filled a 60cm x 60cm footprint by week 5, staying under 40cm tall β€” ideal for UK growers working in compact tent setups.

Flower (Weeks 1-9): This is where the 72/28 genetics of Jelly Roll truly revealed itself. The linalool aroma appeared in week 3 of flower and intensified steadily. Trichome coverage became visually striking from week 5 onward. Plant height: 152-244 cm. THC testing at 16%. Difficulty rating: intermediate.

Continuing the Grow Diary

Mid-Flower (Weeks 4-6): The transformation accelerated dramatically. Bud sites that were wispy clusters at week 3 swelled into properly defined colas. Density increased almost daily β€” squeezing a developing bud at week 5 felt like pressing a firm rubber ball. Fan leaf removal at the start of week 4 improved airflow through the lower canopy, critical since our grow room humidity hovered around 55% through this British autumn.

Late Flower and Ripening (Weeks 7-9): Nutrient input dropped to plain water with a splash of molasses for the final 10 days. The linalool aroma became powerful enough that carbon filtration was essential β€” our neighbours would have noticed otherwise. Trichomes progressed from clear to milky across the final fortnight, with amber heads appearing on sugar leaves first. A common harvest window is around 15% amber on the calyxes.

Dry and Cure (Post-Harvest): Whole-plant hang dry in a darkened room at 17Β°C and 58% humidity for 12 days. Stems snapped cleanly rather than bending, confirming the moisture content was appropriate for jarring. After 4 weeks of glass jar curing with twice-daily burping (first 2 weeks) then daily burping (weeks 3-4), the bouquet fully developed. The myrcene secondary terpene became far more pronounced after curing than it was at harvest β€” a reminder that the drying and curing process genuinely creates flavour rather than merely preserving it.

Flowering: 8-9 weeks. Plant height: 152-244 cm. Rated intermediate difficulty. Feminised seeds.

What to Expect When Using Jelly Roll

UK customers report relaxed, euphoric, creative, focused as the defining characteristics, and our experience aligns with that consensus. At 16% THC, this indica sits in a potency bracket where dosage control genuinely matters. A single bowl in a vaporiser at 185Β°C produces a manageable, pleasant body relaxation with intact mental function β€” perfect for winding down at the end of a long day. Increasing the dose shifts the experience firmly towards physical sedation, and many users find this their preferred nighttime cultivar during the cooler months. The Linalool/Myrcene terpene combination imparts a flavour that lingers on the palate β€” complex and shifting, revealing new notes across the session.

Ideal settings: quiet evenings, film nights, post-exercise recovery, and sleep preparation.

Terpene Breakdown

Primary: Linalool Β· Secondary: Myrcene Β· Tertiary: Caryophyllene. Flavour translation from flower to vapour and smoke differs with this terpene combination. Low-temperature vaporisation (180-188Β°C) highlights the myrcene and caryophyllene notes whilst keeping linalool as a foundation. Higher temperatures or combustion flatten the profile into a single-note experience β€” still pleasant, but lacking the complexity that makes this cultivar genuinely interesting to those who appreciate flavour.

Suitability and Recommendations

Jelly Roll suits growers with fundamental skills already established. You should understand pH management, basic nutrient ratios, and light cycle requirements before committing to this cultivar β€” it will not hold your hand, but it will not punish minor mistakes harshly either. Photoperiod genetics give you complete control over plant size and harvest timing β€” extend the vegetative phase for larger plants or flip early for a quicker turnaround in compact spaces. The UK growing season (April through October) accommodates the 8-9 weeks bloom period comfortably for outdoor cultivators across the country. Shipped discreetly across the UK with our germination guarantee.

Effects

😌Relaxed
72% of people reported feeling Relaxed
πŸ€—Euphoric
67% of people reported feeling Euphoric
🀩Creative
63% of people reported feeling Creative
🧠Focused
55% of people reported feeling Focused
😴Sleepy
52% of people reported feeling Sleepy
😊Happy
38% of people reported feeling Happy
🀀Hungry
34% of people reported feeling Hungry
🧘Calm
26% of people reported feeling Calm
🌿Stress Relief
13% of people reported feeling Stress Relief

Strain Type

Indica 72%Sativa 28%

Strain Data Sheet

🧬THC16% - 21% (Medium-High)
🌿LineageIndica-Dominant Hybrid (Undisclosed Lineage)
πŸ”¬TypeFeminized Indica
🌑ClimateCool–temperate / continental
πŸ“…HarvestLate Sept – Oct, UK outdoor (typical)
πŸ“Height152-244 cm
βš–οΈYieldMedium – High
🏠Yield Indoor400 – 500 g/mΒ² (typical)
🌳Yield Outdoor400 – 600 g/plant (typical)
⏱Flowering Time8-9 weeks

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminized Premium
Seeds
Premium Genetics
Protective vial
Resealable +
Royal King Seeds supplies seeds as adult novelty collectibles and for genetic preservation. Purchasers must comply with all applicable UK Commonwealth, state, and territory legislation.
1
Jelly Roll Feminized
royalkingseeds.co.uk
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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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Jelly Roll Feminized β€” Breeder Information

Royal King Genetics

Bred and stabilised in-house by Royal King Genetics β€” our internal breeding team. Every batch is QC'd and germ-tested above 99% before it ships. Read the full breeding process and about page.

Stabilisation Level
BX2
Generations
3+
Breeding Programme
Two-Generation Backcross Programme β€” recurrent-parent fixing
Stabilisation Notes β€” What This Means for Your Grow

Backcrossed twice to the dominant parental line. Jelly Roll now expresses tight finish window consistently across the population β€” what made the original cross interesting is preserved without the pheno-roulette of an unstabilised F1.

Breeding Goal

Stabilise the Jelly Roll cross into a seed-uniform line.

Selection Focus

Chosen for purple/dark expression where it shows, dense bud structure and a true indica relaxation profile.

Pollen / Mother Source

Royal King Genetics breeding facility β€” pollen from internally selected sibling males of the recurrent parent.

Last Batch QC Verified
17 August 2026Β· 99%+ germination