Grape Inferno cannabis seeds packaging — Royal King Seeds South Africa
Indica
THC 18%
📈 Big Harvest
IndicaFeminisedIn Stock

Grape Inferno Feminised

A indica testing at 18% THC, Grape Inferno Feminised is reported euphoric, calm. Grown right across the country, from the Cape to the Lowveld. Discreet nationwide delivery and a germination guarantee.

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R253.92ZAR
1
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🌱Germination Cover
🔒Nothing on the Box

Royal King Genetics — Seed-Lot Testing

Figures below come from our own seed-lot testing rather than breeder marketing, taken from a single batch tested 2026-02-27 on 175 seeds.

Germination rate: 99.2% (n=175)
Last QC test date: 2026-02-27
Indoor yield: 440-612 g/m² (avg across 12 verified grower reports)
Outdoor yield: 540-804 g/plant (avg across 3 verified grower reports)

About Grape Inferno Feminised

Days 1 to 14, seed to fourth node: Expect Grape Inferno to crack in roughly 48 hours on damp paper towel and to break soil by day three. Early growth comes in low and wide — broad seed leaves first, then the dark fan leaves the indica side is known for. Four nodes by the end of week two, stacked close together. Damping off is rare if you hold near 70% humidity through this stage.

Weeks 3 to 6, building the frame: Top at the fourth node and the laterals take over fast. A 60 x 60 cm footprint filled by week five is normal, still under 40 cm tall, which is what makes this workable in a small tent.

Bloom, weeks 1 to 63: The 79/21 character becomes obvious here. Caryophyllene usually shows in week three and strengthens from there, with trichome cover visible without a loupe from about week five. Indoor yield: 450–550 g/m². Height: Medium to tall. Tested at 18% THC. Difficulty: easy.

Bloom Through to Jar

Weeks 4 to 6. This is where the plant stops looking like a frame and starts looking like a crop. Density climbs almost daily — by week five a developing cola should feel firm rather than springy under light pressure. Pull the fan leaves shading the lower canopy at the start of week four, which matters more than usual if the room is sitting near 55% humidity through a damp autumn.

Weeks 61 to 63, ripening. Drop to plain water for the final ten days. The caryophyllene carry gets strong enough that carbon filtration stops being optional in a residential street. Trichomes run clear to milky across the last fortnight, amber showing on sugar leaves before it reaches the calyxes; around 15% amber on the calyxes themselves is a common place to cut.

Drying and curing. Whole-plant hang in the dark at 17°C and 58% humidity for roughly 12 days — when stems snap instead of bending, it is ready for glass. Burp twice daily for the first fortnight, then once daily through weeks three and four. Finished weight should land near the 450–550 g/m² estimate. The myrcene note comes through markedly stronger after curing than it did at harvest, which is the clearest evidence that a cure builds flavour rather than merely preserving it.

Difficulty: easy. In flower for 56-63 days. Stands Medium to tall. Indoors it returns 450–550 g/m². Outdoors, 450–650 g/plant a plant. Feminised seeds.

Aroma, Flavour and Effect

The first thing Grape Inferno does at 18% THC is settle a warm peppery spice at the back of the throat. The euphoric, calm effects follow within minutes, starting as weight behind the eyes and working down through the shoulders and limbs. Fifteen minutes in there is a physical stillness — not sedation so much as a disinclination to get up. Two to three hours at a moderate dose. Myrcene sits underneath all of it, adding more body, reinforcing the physical side.

The Aromatic Three

Leading with Caryophyllene, then Myrcene, and Bisabolol underneath. How this combination survives the move from flower to vapour or smoke is not a given. Held low, at 180-188°C, the myrcene and bisabolol notes stay legible with caryophyllene underneath them. Run it hotter, or burn it, and the three collapse into one — still pleasant, but without the separation that makes this cultivar worth paying attention to.

Suitability and Recommendations

Who does well with Grape Inferno? Indoor growers who want the harvest date to be their decision. Outdoor growers who want to choose the moment flowering starts. Anyone with the room and the patience to veg it properly before flipping. It is rated easy, which in practice means a moderate learning curve that rewards attention without needing laboratory conditions. Sent nationwide in plain, unbranded packaging, with sourced grow data on every strain page.

Effects

🤗Euphoric
🧘Calm

Reach For It When

Evening
Relaxation
Sleep Support

Strain Type

Indica 79%Sativa 21%

At a Glance

🧬Potency18% - 22% (Medium-High)
🌿ParentsNepali OG × Querkle
🔬Seed TypeFeminised Indica
🌡SuitsHighveld and the drier interior
📅Cut InMarch – May outdoors, planted Sept – Nov
📏Grows ToMedium to tall
⚖️Typical ReturnHigh
🏠Under Light450–550 g/m²
🌳In the Ground450–650 g/plant
Weeks in Bloom56-63 days

In the Packet

Reseals +
RK
Royal King Seeds
Photoperiod
Feminised Premium
Seeds
Inside the Packet
Sealed vial
Reseals +
Royal King Seeds sells seed as an adult collectible and for the preservation of genetics. Knowing and following the law where they live.
1
Grape Inferno Feminised
royalkingseeds.co.za
IG
FB
X
🔒Factory-sealed
💧Water-resistant outer
🛡️Foil-lined inside
🏷️Tamper sticker
📱QR check
🔢Scratch-off serial

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Grape Inferno Feminised — Breeder Information

Royal King Genetics

Recreated and stabilised by Royal King Genetics , the breeding team behind this catalogue. Seed lots are germination-tested before they ship. More on the breeding process and about page.

Stabilisation Level
F3
Generations
3+
Breeding Programme
Royal King Genetics Active Selection — F3 in-progress fixing
Stabilisation Notes — What This Means for Your Grow

F3 stabilisation on the Grape Inferno cross. Three rounds of selection have brought the population to roughly 80% trait homogeneity — a small fraction of pheno variance is still present and is being culled in the next cycle.

Breeding Goal

Reach trait homogeneity in Grape Inferno through advanced filial refinement.

Selection Focus

Chosen for purple/dark expression where it shows, dense bud structure and a true indica relaxation profile.

Pollen / Mother Source

Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.

Last Batch QC Verified
7 September 2026· 95% germination guarantee