XJ-13 cannabis seeds packaging — Royal King Seeds Ireland
Hybrid
THC 23%
🎨 Creative
HybridFeminisedIn Stock

XJ-13 Feminised

Grow XJ-13 Feminised in Ireland. Hybrid genetics testing at 23% THC. Known for energetic, happy, relaxed effects. Ships discreetly nationwide with sourced grow figures.

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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 2026-09-06 on 325 seeds at 21-24°C.

Germination rate: 98.5% (n=325)
Last QC test date: 2026-09-06
Indoor yield: 471-606 g/m² (avg across 15 verified grower reports)
Outdoor yield, Ireland: 535-738 g/plant (avg across 6 verified grower reports)

About XJ-13 Feminised

Does XJ-13 finish outdoors in Ireland? It does, planted out at the end of May and cut by early October. The 50/50 balance handles an Irish season without special treatment, which is most of the reason to choose it. Bloom takes 9-10 weeks, 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 650 gr./m2 indoors and Up to 800 gr./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 XJ-13

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 50/50 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 9-10 weeks of bloom completely; outdoors the plant gets light no lamp matches and can reach Up to 800 gr./plant, and pays for it in rain. Flowering: 9-10 weeks. Indoor yield: Up to 650 gr./m2. Outdoor yield: Up to 800 gr./plant. Plant height: over 185 cm tall if left untrained. Rated intermediate difficulty.

Flavour, aroma and effect

XJ-13 arrives in order. The first draw at 23% THC gives citrus with a bitter edge that lifts off the palate. The energetic, happy, relaxed 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. Caryophyllene underneath contributes warmth that keeps it anchored.

Terpene breakdown

Primary: Limonene · Secondary: Caryophyllene · Tertiary: Linalool. This is a combination that turns up repeatedly in cultivars people rate, and it is usually what gets commented on when a jar is opened for the first time after a proper cure. Limonene anchors it, caryophyllene holds the middle, and linalool sits behind both — the last of those being what separates this from other strains leading on the same terpene.

Who it suits

Who does well with XJ-13? 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

🤑Energetic
71% of people reported feeling Energetic
😊Happy
65% of people reported feeling Happy
😌Relaxed
58% of people reported feeling Relaxed
🤩Creative
56% of people reported feeling Creative
🤗Euphoric
47% of people reported feeling Euphoric
😎Uplifted
38% of people reported feeling Uplifted
🤤Hungry
34% of people reported feeling Hungry
😴Sleepy
31% of people reported feeling Sleepy
😆Giggly
24% of people reported feeling Giggly

Best For

✦ Anxiety
✦ Anytime
✦ Depression
✦ Pain

Strain Type

Indica 50%Sativa 50%

Strain Data Sheet

🧬THC23% - 27% (High)
🌿LineageJack Herer × G13 Haze
🔬TypeFeminised Hybrid
🌡ClimateTemperate, adaptable
📅HarvestSept – Nov, S. hemisphere (typical)
📏Heightover 185 cm tall if left untrained
⚖️YieldTypical for type
🏠Yield IndoorUp to 650 gr./m2
🌳Yield OutdoorUp to 800 gr./plant
⏱Flowering Time9-10 weeks

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.
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XJ-13 Feminised
royalkingseeds.ie
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🔒Sealed for authenticity
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🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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XJ-13 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
F3
Generations
3+
Breeding Programme
F3 Refinement Programme — three-generation selection
Stabilisation Notes — What This Means for Your Grow

XJ-13 runs through our F3 programme. Most of the pack expresses the target pack-to-pack uniformity cleanly; the F3-to-F4 cycle is where we close out the last remaining off-types.

Breeding Goal

Cull off-type phenos in XJ-13 at F3 to lock the cross profile.

Selection Focus

Chosen for terpene profile, vigour, structure and finish-time consistency.

Pollen / Mother Source

Royal King Genetics in-house breeder room — pollen taken from a generation-tracked sibling-male line.

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