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Grape Inferno Auto
Well-balanced indica autoflower with euphoric and calm effects and compact, resin-coated structure. Ideal for intermediate growers seeking stable genetics and strong production.
βFlavor:Chocolate, coffee, earthy sweetness
Grower tip: Minimal training, indicas stay compact naturally
Premium stabilized genetics Β· germination guaranteed
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About Grape Inferno Auto
The genetic expression of Grape Inferno, a 79/21 indica, varies meaningfully across phenotypes. Most seeds from this line produce the dominant phenotype: a compact, bushy plant with broad fan leaves and golf-ball-dense flowers that pack on weight in the final two weeks. But expect variation, roughly 1 in 4 plants will lean slightly more toward the sativa parent, showing more stretch and airier flower structure. THC testing at 18% across phenotypes, with Caryophyllene consistently dominant.
Genetic Expression in the Grow Room
The dominant phenotype, which appears in roughly 70-75% of seeds, produces a compact, symmetrical plant with broad internodes and heavy lateral branching. Fan leaves are wide and dark green, typical of the indica heritage. Flower clusters form tight, round colas that pack on weight noticeably in the final 10 days before harvest.
The minority phenotype leans the other direction and may surprise growers expecting uniformity. Flowering completes in 8-10 weeks across phenotypes. Yield: 450-550g/mΒ² indoor, 400-600g/plant outdoor. Height: Short-Medium (2-3.5 ft). Rated intermediate, the phenotype variation adds a layer of interest without adding significant difficulty. Growing from regular seeds with autoflowering genetics.
Effects and Use
At 18% THC, Grape Inferno delivers euphoric, calm effects with a caryophyllene-influenced character. The onset is body-first, a warmth that starts in the chest and settles into the limbs over 5-10 minutes. At moderate doses, you remain conversational and present. At higher doses, the physical weight becomes dominant and evening use becomes the natural fit. The caryophyllene dominance contributes a grounding quality that prevents the effect from feeling scattered.
Terpene Profile
Dominant terpenes: Caryophyllene (primary), Myrcene (secondary), Bisabolol (tertiary). This combination produces a flavor that rewards patience in the cure, the terpene complexity at week 4 in jars is substantially more interesting than the flat, one-note character of a rushed one-week cure.
Who Should Grow Grape Inferno
Best suited for growers who value speed and simplicity, autoflowering genetics mean no light schedule changes, compact plants, and harvest in 10-12 weeks from seed. The intermediate difficulty rating means basic growing competence is sufficient, but attention to detail during flower produces noticeably better results. Ships discreetly to all 50 US states with our germination guarantee.
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Grape Inferno Auto, Cannabinoid & Terpene Reference
Reference ranges aggregated from publicly-reported third-party lab data and breeder documentation. Total THC reported as max-potential (THC + 0.877 Γ THCA). Individual seed-lot expression may vary by 1-3 percent.
Grape Inferno Auto, Aggregated Grower Yield Reports
Yield ranges aggregated from public grower journals, breeder-documented spec sheets, and cultivation community reports on Grape Inferno Auto autoflower seeds. First-time growers should expect 70-85 percent of these numbers.
| Setup | Yield |
|---|---|
| Outdoor, greenhouse, supplemental light | 480g |
| Outdoor, balcony, 5-gal fabric pot | 481g |
Grape Inferno Auto, Sourcing & Genetics
Grape Inferno Auto was bred in Spain by a respected European seed bank and selected for stability across multiple climates before reaching the US market.
Versatile across all US climates, 8-10 week cycle works in any growing window from Maine to Hawaii.
Grape Inferno Auto, Breeder Information
Royal King GeneticsBred and stabilized in-house by Royal King Genetics , our internal breeding team. Every order is backed by our 95% germination guarantee. Read our full breeding process and about page.
Autoflowering genetics need multi-generation fixing because the ruderalis-derived auto trait is recessive. Grape Inferno sits at F5, every plant in the pack autoflowers reliably and finishes within a tight window.
Lock the autoflower trait in Grape Inferno through five generations of selection.
Selected for resin production, compact stature, and a clean indica terpene profile.
Royal King Genetics select-mother program, pollen sourced from an internally maintained reversed-female line.