Grape Inferno Auto
Grape Inferno Auto: indica cannabis seeds picked for South African conditions. 18% THC, with euphoric, calm the effects most often reported. Posted discreetly countrywide.
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 2026-09-09 on 250 seeds.
About Grape Inferno Auto
Will Grape Inferno handle a South African summer outdoors? Yes. Put this 79/21 indica in the ground between September and November and you will be cutting from March to May. It stays low enough not to clear a boundary wall, and the short frame carries more weight than its size suggests. Bloom runs 50-60 days, placing harvest between March and May across most provinces.
What yield is realistic? up to 250 g/m2 indoors is reachable under decent LED with steady feeding. Outdoors, up to 250 g/plant a plant is normal in 50 litre pots or straight into prepared ground in full sun. At 18% THC with caryophyllene in front, the return on effort is good.
How much can go wrong before it shows? Some. Anyone who understands pH, a feeding schedule and a light cycle will be fine. Neglect it entirely and it will suffer, but a single missed watering will not undo the grow.
The Aromatic Three
Leading with Caryophyllene, then Myrcene, and Bisabolol underneath.
Difficulty: easy. In flower for 50-60 days. Stands 90-120 cm. Medium. Indoors it returns up to 250 g/m2. Outdoors, up to 250 g/plant a plant.
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Related Strains
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Killer Grape Auto
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Grape Inferno Auto — Breeder Information
Royal King GeneticsRecreated 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.
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 inside a tight window.
Lock the autoflower trait in Grape Inferno through five generations of selection.
Chosen for resin output, a low-slung stature and a clean indica terpene fingerprint.
Royal King Genetics select-mother programme — pollen drawn from an internally maintained reversed-female line.