
XXX OG Feminised
XXX OG Feminised cannabis seeds for UK growers. Indica · 22% THC · euphoric, relaxed, sleepy. Discreet UK delivery, priced in GBP.
Royal King Genetics — first-party test batch
Figures below are from our internal seed-lot QC and verified UK grower submissions, not breeder marketing. Determined from a single batch tested 2026-09-23 on 300 seeds.
About XXX OG Feminised
Will XXX OG finish outdoors in Britain? Yes, within the April to October season. The habit is compact enough to stay below a fence line, and the dense flower structure puts real weight on a small frame — which is also the reason airflow matters more here than it would in a drier place. Flowering runs about 8 weeks, which puts harvest in September or October for most of the country.
What yield is realistic? Up to 500g/m² indoors is achievable with competent LED lighting and attention to feeding. Outdoors, Up to 600 gr is realistic in 50 litre pots or in prepared ground with full sun — and "full sun" is doing a lot of work in that sentence at these latitudes, so the position you pick in the garden matters more than the pot you buy. At 22% THC with a caryophyllene-forward profile, the return on the effort is sound.
Is it forgiving? Reasonably. Anyone comfortable with pH, a feed schedule and a light timer will get a good result. It will not hold your hand, but it will not punish one missed watering either.
Further questions we get asked about XXX OG
Which medium? For flavour, peat-free soil cut with about 30% perlite and amended slowly — fish, blood and bone, rock phosphate, seaweed meal, all of it available at any British garden centre. For weight, coco with fertigation at EC 1.4-1.8 through bloom. This indica performs in both; the choice is about what you want out of it.
How does it handle a British summer? The dense foliage shades itself, which helps. Above 30°C growth stalls but the plant does not fold. Mulch the root zone and water before seven in the morning and heat stress stops being a factor in nearly every part of the country. The more common British problem is the opposite one: a cold, wet July that never lets the plant dry out between waterings.
When do I switch to bloom feed? Inside the first week of visible pistils. The 75/25 balance shifts its demand quickly at the transition — phosphorus and potassium up, nitrogen down. Soil growers can top-dress with guano and sulphate of potash; coco and hydro should move to a low-nitrogen bloom formula straight away.
Indoors or outdoors? Both work, for different reasons. Indoors you own the flowering environment completely. Outdoors, across the April to October season, the plant gets a light intensity no domestic LED matches and can reach Up to 600 gr — at the price of accepting whatever the autumn does. Flowering: about 8 weeks. Indoor yield: Up to 500g/m². Outdoor yield: Up to 600 gr. Rated intermediate difficulty.
Flavour, aroma and effect
XXX OG arrives in stages. The first draw at 22% THC brings dry pepper that registers at the back of the throat. The euphoric, relaxed, sleepy character follows within minutes, starting as weight behind the eyes and working down through the shoulders and chest. By about a quarter of an hour it has become a physical stillness — not sedation so much as a strong disinclination to get up. Two to three hours at a moderate dose. The myrcene underneath adds body and depth beneath the rest.
Terpene breakdown
Primary: Caryophyllene · Secondary: Myrcene · Tertiary: Bisabolol. These three build an aroma that keeps moving through the cure. Fresh off the dry it leads with caryophyllene; after three or four weeks sealed in glass at 16-18°C the bisabolol underneath comes up and the whole thing gains a layer. Vaporising between 180°C and 195°C catches the widest span of them, since the lighter bisabolol molecules are the first thing heat destroys.
Who it suits
Who does well with XXX OG? Indoor growers who want the timeline under their own control. Outdoor growers who want to choose when flowering starts. Anyone with the room and the patience to veg it properly before flipping. Difficulty is rated intermediate, which means a moderate learning curve that rewards attention without demanding a laboratory.
Effects
Strain Type
Strain Data Sheet
Packaging
Feminised Premium
Seeds
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XXX OG Feminised — Breeder Information
Royal King GeneticsBred 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.
XXX OG has been the target of countless seed-bank backcross programmes. Ours is BX3 — three rounds of crossing the elite cut back to the parental line until trait expression evened out. The pack grows true to the mother cut.
Reproduce the original XXX OG mother in pack-to-pack seed stock.
Chosen for purple/dark expression where it shows, dense bud structure and a true indica relaxation profile.
Royal King Genetics breeding facility — pollen from internally selected sibling males of the recurrent parent.