Big Devil cannabis seeds packaging — Royal King Seeds Ireland
HybridAuto
THC 18%
😊 Beginner Pick
HybridAutoflowerIn Stock

Big Devil Auto

Grow Big Devil Auto in Ireland. Hybrid genetics testing at 18% THC. Known for euphoric, creative, energetic effects. Ships discreetly nationwide with sourced grow figures.

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€13.69EUR
1
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🌱Germination Promise
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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 2026-09-16 on 375 seeds at 21-24°C.

Germination rate: 96.4% (n=375)
Last QC test date: 2026-09-16
Indoor yield: 449-612 g/m² (avg across 13 verified grower reports)
Outdoor yield, Ireland: 427-664 g/plant (avg across 8 verified grower reports)

About Big Devil Auto

Growing Big Devil in Ireland is a question of rain and wind rather than of heat or latitude. The whole island runs temperate oceanic, so nowhere is meaningfully warmer than anywhere else — what changes as you move west is how many wet days land on the plant while it is in flower. Outdoors that makes bud structure and the 9 weeks seed to harvest of bloom the two things worth reading before anything else, because a dense cola and a wet October are a poor combination. Under a tunnel or under lights the argument disappears: Big Devil is then judged on its genetics and on nothing else.

Growing it on this island

The pressures here are consistent and they are nearly all about water. Botrytis in dense flower from September onwards is the first, and it is answered with open structure, moving air and a roof — not with anything sprayed on afterwards. Indoors, spider mite and thrips arrive the way they always do, and humidity above 60% in late bloom is what turns a manageable problem into a lost room. Outdoors in a wet spring the slugs do more damage to seedlings than every insect on the plot, and they do it in a single night.

A polytunnel changes the arithmetic on Big Devil more than any other single purchase. It adds a fortnight at both ends of the season, keeps the rain off the flower during the weeks that matter, and turns a marginal outdoor crop into a reliable one.

Flavour, aroma and effect

Big Devil arrives in order. The first draw at 18% THC gives peppercorn heat that lands at the back of the throat. The euphoric, creative, energetic, calm 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. 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. Caryophyllene anchors it, limonene holds the middle, and myrcene 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 Big Devil? Back-garden and balcony growers in Dublin, Cork and Galway. Anyone who wants a crop dry and put away before the autumn closes in. Indoor growers short of headroom. The autoflowering genetics run to their own clock, so there is no schedule to manage and no anxiety about light leaks. Rated beginner, which means a first grow with a basic setup and a bit of discipline about feeding will produce something worth having.

Effects

🤗Euphoric
74% of people reported feeling Euphoric
🤩Creative
70% of people reported feeling Creative
🤑Energetic
57% of people reported feeling Energetic
🧘Calm
53% of people reported feeling Calm
😌Relaxed
45% of people reported feeling Relaxed
😊Happy
38% of people reported feeling Happy
😎Uplifted
31% of people reported feeling Uplifted
🤤Hungry
27% of people reported feeling Hungry
😴Sleepy
24% of people reported feeling Sleepy

Best For

✦ Anytime
✦ Relaxation
✦ Stress Relief

Strain Type

Indica 44%Sativa 56%

Strain Data Sheet

🧬THC18% - 22% (Medium-High)
🌿LineageAutoflowering Balanced Hybrid (Undisclosed Lineage)
🔬TypeAutoflower Hybrid
🌡ClimateAll climates (adaptable)
📅Harvest≈ 10 – 11 weeks from seed (typical)
📏Height100-150 cm
⚖️YieldHigh
🏠Yield Indoor400-550 g/m2
🌳Yield Outdoor40-250 g/plant
⏱Flowering Time9 weeks seed to harvest

Packaging

Resealable +
RK
Royal King Seeds
Autoflowering
Regular
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
Big Devil Auto
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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Big Devil Auto — 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
F5
Generations
5+
Breeding Programme
Royal King Genetics Auto Line — recessive trait stabilisation
Stabilisation Notes — What This Means for Your Grow

Big Devil is an autoflowering line that has been progressed through five rounds of Royal King Genetics autoflower stabilisation. The autoflower trait is recessive — fixing it takes multi-generation work — and at F5 the auto trigger and finish window are welded across the pack.

Breeding Goal

Reach auto trigger and finish-window uniformity for the Big Devil pack.

Selection Focus

Chosen for hybrid frame, clean terpene expression and consistent yield across the population.

Pollen / Mother Source

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

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