Ancient OG cannabis seeds packaging — Royal King Seeds UK
Indica
THC 21%
🌙 Sleep Aid
IndicaFeminisedIn Stock

Ancient OG Feminised

Feminised PhotoperiodSee Lab Report →

Grow Ancient OG Feminised in the UK. Indica genetics at 21% THC, known for relaxed, sleepy, happy effects.

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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 2026-08-31 on 150 seeds.

Germination rate: 97.1% (n=150)
Last QC test date: 2026-08-31
Indoor yield: 422-542 g/m² (avg across 10 verified grower reports)
Outdoor yield: 502-800 g/plant (avg across 9 verified grower reports)

About Ancient OG Feminised

Read Ancient OG backwards from the harvest: up to 400 g/m2 under lights, up to 550 g/plant outdoors, with resin filling out towards 21% THC. Most of the final weight lands between weeks five and eight, when the 77/23 genetics stack calyxes quickly and the trichome cover goes from scattered to solid. Outdoors you want that stage falling in late August and early September while the light is still long, so count back to it from the first frost your own area usually sees rather than from a date on a packet.

Getting the weight out of this plant

Three stretches of the 60-65 days of bloom decide whether you reach the top of this strain's range (up to 400 g/m2 indoors, up to 550 g/plant outdoors). The rest is maintenance.

The first ten days of flower. What the plant does during the stretch sets canopy height, and canopy height sets how evenly the light lands. Expect 20-30%, which is manageable; stripping the lowest fans around day seven sends the energy up to the sites that will actually finish.

Weeks three to five. Caryophyllene production climbs through here, and it responds to a day-night temperature gap of 6-8°C. British autumn nights hand that to outdoor growers for free from September; indoors you have to build it, at roughly 25-26°C lights-on and 18-20°C lights-off. Bloom feed goes potassium-heavy around EC 1.6-1.8.

The last ten to fourteen days. Stop feeding and run pH-corrected water. Check trichomes daily under a 60x loupe — cut at 15-20% amber for the weight of effect this genetics is bought for. Outdoors that lands between late September and mid-October across most of Britain, and the weather forecast should get a vote.

Flowering: 60-65 days. Indoor yield: up to 400 g/m2. Outdoor yield: up to 550 g/plant. Rated intermediate difficulty.

Flavour, aroma and effect

Ancient OG arrives in stages. The first draw at 21% THC brings dry pepper that registers at the back of the throat. The relaxed, sleepy, happy 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. This combination turns up often in cultivars that win things, and it is usually the one growers comment on when a jar is opened for the first time after curing. Caryophyllene anchors the aroma, myrcene occupies the middle, and bisabolol sits behind both — which is the part that separates this strain from others sharing its primary terpene.

Who it suits

Who does well with Ancient 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

😌Relaxed
72% of people reported feeling Relaxed
😴Sleepy
72% of people reported feeling Sleepy
😊Happy
58% of people reported feeling Happy
🤤Hungry
54% of people reported feeling Hungry
🤗Euphoric
47% of people reported feeling Euphoric
🧘Calm
40% of people reported feeling Calm
🌿Stress Relief
27% of people reported feeling Stress Relief
💆Body High
24% of people reported feeling Body High
😶‍🌫️Sedated
21% of people reported feeling Sedated

Strain Type

Indica 77%Sativa 23%

Strain Data Sheet

🧬THC21% - 26% (High)
🌿LineageIndica-Dominant Hybrid (Undisclosed Lineage)
🔬TypeFeminised Indica
🌡ClimateCool–temperate / continental
📅HarvestLate Sept – Oct, UK outdoor (typical)
📏Height90 – 120 cm (typical)
⚖️YieldMedium – High
🏠Yield Indoorup to 400 g/m2
🌳Yield Outdoorup to 550 g/plant
⏱Flowering Time60-65 days

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminised Premium
Seeds
Premium Genetics
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Royal King Seeds supplies seeds as adult novelty collectibles and for genetic preservation. Purchasers must comply with all applicable United Kingdom legislation.
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Ancient OG Feminised
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Ancient OG Feminised — Breeder Information

Royal King Genetics

Bred 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.

Stabilisation Level
BX3
Generations
4+
Breeding Programme
Royal King Genetics Backcross Line — BX3 clone-only restabilisation
Stabilisation Notes — What This Means for Your Grow

A recent-era clone-only original brought to seed via a three-generation backcross programme. Vigour, terpene character and tight finish window are all locked. The pack runs true to the cut your mate grew off a clone last season.

Breeding Goal

Recreate the Ancient OG clone-only cut in stable seed form.

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
15 September 2026· 99%+ germination