
Diablo Feminised
A hybrid testing at 18% THC, Diablo Feminised is reported happy, relaxed, sleepy. Grown right across the country, from the Cape to the Lowveld. Discreet nationwide delivery and a germination guarantee.
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 2026-03-05 on 325 seeds.
About Diablo Feminised
The way to plan Diablo is backwards from the day you intend to cut, with up to 200 g/m2 per square metre indoors and up to 200 g/plant per plant outdoors as the figures you are working toward, at 18% THC. Count 50-60 days back from that date and you have your flip date. Weight comes on evenly across 50-60 days, with a late surge that punishes impatience. The 40/50 balance gives you stacking density and broad trichome cover together. Outdoors, late March to late April is the sweet spot — after the summer humidity has broken, before the first Highveld frost.
Where the Weight Actually Comes From
Yield on Diablo — the up to 200 g/m2 indoors and up to 200 g/plant outdoors quoted above — is decided in three short stretches of the 50-60 days bloom rather than evenly across it.
The first ten days after the flip. Whatever stretch happens here sets your canopy, and an uneven canopy wastes light for the remainder of the grow. Stretch of 30-40% is normal. One round of low-stress training on the tallest shoots levels it out.
Weeks three to five. This is when limonene production climbs, and it answers to the gap between day and night temperature rather than to either number on its own. Keep at least 6-8°C between them. Outdoor growers in the interior provinces get that swing free in March and April; indoors, aim for 25-26°C lights-on against 18-20°C lights-off, with potassium-led bloom feed at EC 1.6-1.8.
The last ten to fourteen days. Stop feeding, flush with pH-corrected water, and read trichomes daily under a 60x loupe. Cut at 10-15% amber to keep both sides of the hybrid in play. Outdoors that usually lands between late March and mid-April.
Difficulty: moderate. In flower for 50-60 days. Stands Medium (150-245 cm). Indoors it returns up to 200 g/m2. Outdoors, up to 200 g/plant a plant.
Aroma, Flavour and Effect
The first thing Diablo does at 18% THC is lift it with a bright, nearly effervescent citrus. The happy, relaxed, sleepy effects follow within minutes, across head and body at once. Thinking stays clear while muscle tension drains off, which leaves the dose as the deciding factor — light for the afternoon, heavier and it moves into the evening without a jolt. Caryophyllene sits underneath all of it, adding a grounding warmth that keeps the whole thing anchored.
The Aromatic Three
Leading with Limonene, then Caryophyllene, and Linalool underneath. This trio turns up repeatedly in cultivars that win things, and it is why a jar of Diablo tends to get a reaction the first time it is opened after curing. Limonene sets the anchor, caryophyllene fills the middle, and linalool sits in the background doing the work that separates this from every other strain built on the same primary terpene.
Suitability and Recommendations
Who does well with Diablo? 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 moderate, 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
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Strain Type
At a Glance
In the Packet
Feminised Premium
Seeds
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Diablo Feminised — 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.
Diablo runs through our F3 programme. Most of the pack expresses the target trichome production cleanly; the F3-to-F4 cycle is where we close out the last remaining off-types.
Stabilise Diablo across three rounds toward F4 production-ready stock.
Chosen for trichome density, bud structure and the hybrid trait balance the cross was engineered for.
Royal King Genetics in-house breeder room — pollen taken from a generation-tracked sibling-male line.