RK
A-10 cannabis seeds packaging β€” Royal King Seeds UK
Indica
THC 18-22%
🎨 Creative
IndicaFeminisedIn Stock

A-10 Feminised

Feminised PhotoperiodSee Lab Report β†’

Grow A-10 Feminised in the UK. Indica genetics at 18-22% THC, known for creative, relaxed, happy effects.

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Β£7.83
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Royal King Genetics β€” 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 175 seeds.

Germination rate: 99.1% (n=175)
Last QC test date: 2026-09-23
Indoor yield: 452-606 g/mΒ² (avg across 8 verified grower reports)
Outdoor yield: 484-820 g/plant (avg across 7 verified grower reports)

About A-10 Feminised

Germination and early veg, days 1-14. A-10 seeds generally crack inside 48 hours on damp kitchen roll and break the surface around day three. Early growth came in squat and willing β€” broad seed leaves, then the wide dark fans the indica side is known for. Four nodes by day 14 with the internodes already tight. Damping off is rare around 70% relative humidity, which is also roughly what an unheated British room sits at in spring.

Veg, weeks 3-6. Side branching took off after a top at the fourth node. The plant held a 60cm square by week five and stayed under 40cm tall, which is the shape you want in the small tents most people actually own.

Bloom, weeks 1-9. This is where the 70/20 balance in A-10 showed itself. The myrcene came up in week three and kept building; trichome cover was obvious to the naked eye from week five. Indoor yield: up to 400 g/m2. THC testing at 18-22%. Rated intermediate.

The rest of the diary

Mid-bloom, weeks 4-6. The change came quickly. Sites that were loose and wispy at week three closed into defined colas. Density went up almost daily; by week five a developing bud squeezed like a firm rubber ball. Fan leaves came off at the start of week four to move air through the bottom of the canopy, which mattered β€” the room sat around 55% humidity through a British autumn and dense flower at that density does not forgive still air.

Ripening, weeks 7-9. Feeding dropped to plain water for the last ten days. The myrcene got strong enough that carbon filtration stopped being optional in a terraced house. Trichomes ran clear to milky across the final fortnight, amber showing on sugar leaves first. Around 15% amber on the calyxes is a common place to stop.

Drying and curing. Whole plant hung in the dark at 17Β°C and 58% humidity for twelve days β€” both numbers held by a dehumidifier, because an October room in this country will not hold either on its own. Stems snapped rather than bent, which is the test worth trusting. Four weeks in glass followed, burped twice daily for the first fortnight and once daily after. Final weight matched the up to 400 g/m2 figure. The caryophyllene was far more present after the cure than at harvest, which is the argument for curing properly: the process makes flavour rather than merely keeping it.

Flowering: 50-60 days. Indoor yield: up to 400 g/m2. Outdoor yield: up to 450 g/plant. Rated intermediate difficulty. Feminised seeds.

Flavour, aroma and effect

A-10 arrives in stages. The first draw at 18-22% THC brings a musky earthiness that coats rather than cuts. The creative, relaxed, 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 β€” not sedation so much as a strong disinclination to get up. Two to three hours at a moderate dose. The caryophyllene underneath adds a warmth that keeps the whole thing anchored.

Terpene breakdown

Primary: Myrcene Β· Secondary: Caryophyllene Β· Tertiary: Linalool. How this profile survives the journey from flower to vapour depends on temperature. Low vaporisation, 180-188Β°C, keeps the caryophyllene and linalool audible over the myrcene base. Run it hotter, or burn it, and the three collapse into one note β€” pleasant enough, but none of the complexity that made it worth choosing.

Who it suits

Who does well with A-10? 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

🀩Creative
77% of people reported feeling Creative
😌Relaxed
65% of people reported feeling Relaxed
😊Happy
58% of people reported feeling Happy
😴Sleepy
58% of people reported feeling Sleepy
🀀Hungry
48% of people reported feeling Hungry
πŸ€—Euphoric
40% of people reported feeling Euphoric
🧘Calm
33% of people reported feeling Calm
🌿Stress Relief
20% of people reported feeling Stress Relief
πŸ’†Body High
17% of people reported feeling Body High

Strain Type

Indica 70%Sativa 20%

Strain Data Sheet

🧬THC1822% - 1826% (Very High)
🌿LineageIndica-Dominant Hybrid (Undisclosed Lineage)
πŸ”¬TypeFeminised Indica
🌑ClimateCool–temperate / continental
πŸ“…HarvestLate Sept – Oct, UK outdoor (typical)
πŸ“Height90 – 120 cm (typical)
βš–οΈYieldMedium – High
🏠Yield Indoorup to 400 g/m2
🌳Yield Outdoorup to 450 g/plant
⏱Flowering Time50-60 days

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminised Premium
Seeds
Premium Genetics
Protective vial
Resealable +
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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A-10 Feminised
royalkingseeds.co.uk
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πŸ”’Sealed for authenticity
πŸ’§Waterproof coating
πŸ›‘οΈAluminium interior lining
🏷️Protective sticker
πŸ“±QR code verification
πŸ”’Scratchable serial number

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A-10 Feminised β€” Breeder Information

Royal King Genetics

Bred and stabilised in-house by Royal King Genetics β€” 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
BX2
Generations
3+
Breeding Programme
Backcross Stabilisation (BX2) β€” modern hybrid fixing
Stabilisation Notes β€” What This Means for Your Grow

A-10 carries clone-derived parents from the modern hybrid. We backcrossed twice to the dominant parent (BX2) to weld cut-specific traits into seed-stable form. Vigour and compact internode spacing run uniform across the population.

Breeding Goal

Pin the compact internode spacing that came out of the original A-10 cross.

Selection Focus

Chosen for resin density, indica-leaning frame and tight internodes that suit indoor production.

Pollen / Mother Source

Royal King Genetics in-house mother stock β€” pollen taken from a sibling male drawn from the same selected pheno population.

Last Batch QC Verified
6 September 2026Β· 99%+ germination