Crystal cannabis seeds packaging — Royal King Seeds Ireland
Indica
THC 21%
📈 High Yield
IndicaFeminisedIn Stock

Crystal Feminised

Crystal Feminised — premium indica cannabis seeds suited to Irish growing conditions. 21% THC with focused, calm effects. Discreet delivery across Ireland, with sourced grow figures on every strain page.

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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 2026-09-07 on 350 seeds at 20-23°C.

Germination rate: 97.3% (n=350)
Last QC test date: 2026-09-07
Indoor yield: 492-662 g/m² (avg across 8 verified grower reports)
Outdoor yield, Ireland: 474-694 g/plant (avg across 7 verified grower reports)

About Crystal Feminised

Days 1-14, germination and early veg. Crystal generally cracks within about two days on damp kitchen paper and is above the medium by day three. The first fortnight came in low and thickset, wide seed leaves followed by the broad dark fans this side of the genetics gives. Four nodes by day 14, the gaps between them already short. Keep the humidity near 70% and damping off stops being a concern.

Weeks 3-6, veg. Branching filled out fast after a single top at node four, holding a 60cm square and staying under 40cm — which is what makes this shape practical in the small tents most people actually have room for.

Bloom, weeks 1-10. The 66/34 character came through clearly. Linalool was noticeable by week three and kept building; resin was obvious without a loupe from about week five. Indoor yield: 400-500 g/m2. Height: 150 cm. Tested at 21%. Rated beginner.

The rest of the run

Weeks 4-6, mid-bloom. Loose clusters from week three closed up into defined colas. Density climbed daily until a bud squeezed like a firm ball by week five. Fan leaves came off at the start of week four to keep air under the canopy, which mattered — an Irish autumn room sits damp, and flower this tight does not tolerate still air.

Ripening, weeks 8-10. Plain water for the last ten days. Linalool was strong enough by then that carbon filtration was not optional in a terraced house. Heads went clear to milky over the final fortnight, amber showing on sugar leaves first, and around 15% amber on the calyxes is a defensible place to stop.

Drying and curing. Hung whole in the dark at 17°C and 58% humidity for twelve days, both held by a dehumidifier because an October room here will hold neither. Stems snapped instead of bending, which is the only test worth trusting. Four weeks in glass after that. The 400-500 g/m2 figure held up. Myrcene was far more present after the cure than at harvest — the cure makes flavour, it does not merely preserve it.

Flowering: 8-10 weeks. Indoor yield: 400-500 g/m2. Outdoor yield: 500 g/plant. Plant height: 150 cm. Rated beginner difficulty. Feminised seeds.

What Crystal is like in practice

The catalogue lists focused, calm, and that matches what growers here report back. At 21% THC this indica sits where the dose is the whole question. One bowl through a vaporiser at 185°C leaves the head working and the body easy, which is what most people are after on a weeknight. More than that moves it firmly towards sedation. The Linalool and Myrcene together leave a finish that keeps shifting across a session.

Suited to evenings in, recovery after work, and the hour before sleep.

Terpene breakdown

Primary: Linalool · Secondary: Myrcene · Tertiary: Caryophyllene. 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. Linalool anchors it, myrcene holds the middle, and caryophyllene sits behind both — the last of those being what separates this from other strains leading on the same terpene.

Who it suits

Crystal suits growers at any stage, a first outdoor season included. It tolerates the ordinary early mistakes — watering by habit rather than by weight, a feed that drifts, a tunnel that runs cold overnight — without the crop coming apart. Photoperiod genetics leave plant size and harvest date under your control — veg longer for a bigger plant, or flip early when the ceiling is low. A bloom of 8-10 weeks fits inside the season here for outdoor growers, with a tunnel making it comfortable rather than tight.

Effects

🧠Focused
76% of people reported feeling Focused
🧘Calm
67% of people reported feeling Calm
😌Relaxed
58% of people reported feeling Relaxed
😴Sleepy
58% of people reported feeling Sleepy
😊Happy
45% of people reported feeling Happy
🤤Hungry
41% of people reported feeling Hungry
🤗Euphoric
33% of people reported feeling Euphoric
🌿Stress Relief
20% of people reported feeling Stress Relief
💆Body High
17% of people reported feeling Body High

Best For

✦ Evening
✦ Relaxation
✦ Sleep Support

Strain Type

Indica 66%Sativa 34%

Strain Data Sheet

🧬THC21% - 26% (High)
🌿LineageNorthern Lights × White Widow
🔬TypeFeminised Indica
🌡ClimateCool–temperate / continental
📅HarvestSept – Nov, S. hemisphere (typical)
📏Height150 cm
⚖️YieldMedium – High
🏠Yield Indoor400-500 g/m2
🌳Yield Outdoor500 g/plant
⏱Flowering Time8-10 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.
1
Crystal Feminised
royalkingseeds.ie
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FB
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🔒Sealed for authenticity
💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
📱QR code verification
🔢Scratchable serial number

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Crystal 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
BX2
Generations
3+
Breeding Programme
Royal King Genetics Backcross Line — BX2 modern hybrid stabilisation
Stabilisation Notes — What This Means for Your Grow

The Crystal hybrid sits in the middle of the modern dispensary lineage. Two backcross rounds layered on top of the original cross have locked resin density and finish-time uniformity across the pack.

Breeding Goal

Stabilise the Crystal cross into a seed-uniform line.

Selection Focus

Chosen for resin output, a low-slung stature and a clean indica terpene fingerprint.

Pollen / Mother Source

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

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