J1 cannabis seeds packaging — Royal King Seeds Ireland
Hybrid
THC 23%
🎨 Creative
HybridFeminisedIn Stock

J1 Feminised

Grow J1 Feminised in Ireland. Hybrid genetics testing at 23% THC. Known for creative, happy, uplifted effects. Ships discreetly nationwide with sourced grow figures.

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€14.15EUR
1
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Royal King Genetics — first-party test batch

Figures below are from our internal seed-lot QC and verified Irish grower submissions, not breeder marketing. Determined from a single batch tested 2026-09-14 on 450 seeds at 21-24°C.

Germination rate: 97.9% (n=450)
Last QC test date: 2026-09-14
Indoor yield: 459-582 g/m² (avg across 11 verified grower reports)
Outdoor yield, Ireland: 441-688 g/plant (avg across 10 verified grower reports)

About J1 Feminised

Does J1 finish outdoors in Ireland? It does, planted out at the end of May and cut by early October. The 40/60 balance handles an Irish season without special treatment, which is most of the reason to choose it. Bloom takes 55-65 days, so the harvest date is set by the calendar far more than by your technique.

What should I expect to take off it? up to 450 g/m2 indoors and up to 600 g/plant outdoors are the published figures, and both assume a full light or a full season plus a root run to match. A tunnel gets you most of the way to the outdoor number; a windowsill will not. At 23% THC the effort is well spent either way.

Is it a sensible first grow? Reasonably. Anyone who has finished one grow will manage this one; it asks for consistency rather than expertise.

Other questions that come up about J1

Soil or coco? Coco with fertigation at EC 1.4-1.8 through bloom if you are there daily and want speed. Peat-free soil with slow amendments — fish, blood and bone, seaweed meal, rock phosphate — if you are not, and want flavour. Both suit this hybrid; the deciding factor is your week, not the plant.

How does it handle the weather here? Hybrid vigour covers most of what an Irish summer does. Keep the root zone under 28°C and do not transplant into a warm spell.

When does bloom feed start? Within a week of the first pistils. The 40/60 balance shifts demand quickly at the transition — phosphorus and potassium up, nitrogen down. Soil growers top-dress; coco and hydro switch formula immediately.

Tunnel, outdoors or indoors? A tunnel is the best value of the three here. Indoors you own the 55-65 days of bloom completely; outdoors the plant gets light no lamp matches and can reach up to 600 g/plant, and pays for it in rain. Flowering: 55-65 days. Indoor yield: up to 450 g/m2. Outdoor yield: up to 600 g/plant. Plant height: Medium. Rated intermediate difficulty.

Flavour, aroma and effect

J1 arrives in order. The first draw at 23% THC gives peppercorn heat that lands at the back of the throat. The creative, happy, uplifted character follows in minutes, as head and body together. Thinking stays clear while the muscles let go by degrees, which is what makes the dose, rather than the genetics, the thing that decides the evening. Limonene underneath contributes a lift that stops it going heavy.

Terpene breakdown

Primary: Caryophyllene · Secondary: Limonene · Tertiary: Myrcene. The three shift relative to each other across the cure. Straight off the dry the caryophyllene dominates; three or four weeks sealed in glass at 16-18°C and the myrcene underneath comes up to meet it. Vaporising between 180°C and 195°C catches the widest span, because heat takes the lighter myrcene molecules first.

Who it suits

Who does well with J1? Indoor growers who want to choose their own timeline. Tunnel growers who want to decide when flowering starts rather than letting August decide it. Anyone with the space to veg it properly first. Rated intermediate, which means a moderate learning curve that rewards attention without needing specialist kit.

Effects

🤩Creative
77% of people reported feeling Creative
😊Happy
65% of people reported feeling Happy
😎Uplifted
58% of people reported feeling Uplifted
😌Relaxed
51% of people reported feeling Relaxed
🤗Euphoric
47% of people reported feeling Euphoric
🤤Hungry
41% of people reported feeling Hungry
😴Sleepy
38% of people reported feeling Sleepy
😆Giggly
31% of people reported feeling Giggly
🧠Focused
21% of people reported feeling Focused

Best For

✦ Anytime
✦ Depression
✦ Fatigue
✦ Stress

Strain Type

Indica 40%Sativa 60%

Strain Data Sheet

🧬THC23% - 28% (High)
🌿LineageJack Herer × Skunk #1
🔬TypeFeminised Hybrid
🌡ClimateTemperate, adaptable
📅HarvestSept – Nov, S. hemisphere (typical)
📏HeightMedium
⚖️YieldMedium – High
🏠Yield Indoorup to 450 g/m2
🌳Yield Outdoorup to 600 g/plant
⏱Flowering Time55-65 days

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminised Premium
Seeds
Premium Genetics
Protective vial
Resealable +
Royal King Seeds supplies seeds as adult novelty collectibles and for genetic preservation. Purchasers are responsible for complying with the law where they live.
1
J1 Feminised
royalkingseeds.ie
IG
FB
X
🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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J1 Feminised — Breeder Information

Royal King Genetics

Bred and stabilised in-house by Royal King Genetics — 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
F4
Generations
4+
Breeding Programme
Filial Stabilisation (F4) — four-generation selection
Stabilisation Notes — What This Means for Your Grow

Four rounds of filial stabilisation on the J1 cross. The trichome production expression sits uniform; pheno-to-pheno yield variation runs within ±10% of the published numbers.

Breeding Goal

Pin trichome production consistency across the J1 population.

Selection Focus

Chosen for balanced indica/sativa expression, terpene fidelity and pack-to-pack uniformity.

Pollen / Mother Source

Royal King Genetics select-mother programme — pollen drawn from an internally maintained reversed-female line.

Last Batch QC Verified
7 September 2026· 99%+ germination