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

A-10 Feminized

Feminized PhotoperiodSee Lab Report β†’

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

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Β£8.13
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About A-10 Feminized

Germination & Early Veg (Days 1-14): A-10 seeds typically crack within 48 hours using the damp paper towel method and break soil by around day 3. Early growth was squat and vigorous β€” broad cotyledons followed by wide, dark-green fan leaves typical of the indica heritage. By day 14 expect around four established nodes with tight internodal spacing. Damping off is uncommon at around 70% relative humidity during this phase.

Vegetative Growth (Weeks 3-6): Lateral branching exploded after topping at the fourth node. The plant filled a 60cm x 60cm footprint by week 5, staying under 40cm tall β€” ideal for UK growers working in compact tent setups.

Flower (Weeks 1-60): This is where the 70/20 genetics of A-10 truly revealed itself. The myrcene aroma appeared in week 3 of flower and intensified steadily. Trichome coverage became visually striking from week 5 onward. Final indoor yield: up to 400 g/m2. THC testing at 18-22%. Difficulty rating: intermediate.

Continuing the Grow Diary

Mid-Flower (Weeks 4-6): The transformation accelerated dramatically. Bud sites that were wispy clusters at week 3 swelled into properly defined colas. Density increased almost daily β€” squeezing a developing bud at week 5 felt like pressing a firm rubber ball. Fan leaf removal at the start of week 4 improved airflow through the lower canopy, critical since our grow room humidity hovered around 55% through this British autumn.

Late Flower and Ripening (Weeks 58-60): Nutrient input dropped to plain water with a splash of molasses for the final 10 days. The myrcene aroma became powerful enough that carbon filtration was essential β€” our neighbours would have noticed otherwise. Trichomes progressed from clear to milky across the final fortnight, with amber heads appearing on sugar leaves first. A common harvest window is around 15% amber on the calyxes.

Dry and Cure (Post-Harvest): Whole-plant hang dry in a darkened room at 17Β°C and 58% humidity for 12 days. Stems snapped cleanly rather than bending, confirming the moisture content was appropriate for jarring. After 4 weeks of glass jar curing with twice-daily burping (first 2 weeks) then daily burping (weeks 3-4), the bouquet fully developed. Final weight confirmed the up to 400 g/m2 yield estimate. The caryophyllene secondary terpene became far more pronounced after curing than it was at harvest β€” a reminder that the drying and curing process genuinely creates flavour rather than merely preserving 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 Experience

The sensory arc of A-10 unfolds in stages. Initial inhalation at 18-22% THC brings a deep, musky earthiness that coats the palate. The creative, relaxed, happy effects emerge within minutes, beginning as a pleasant heaviness behind the eyes that migrates downward through the shoulders, chest, and limbs. By the fifteen-minute mark, a deep physical stillness sets in β€” not sedation exactly, but a reluctance to move that makes the couch remarkably appealing. Duration runs 2-3 hours at moderate doses. The caryophyllene secondary terpene adds a distinct layer: a grounding warmth that prevents the experience from feeling unanchored.

Terpene Breakdown

Primary: Myrcene Β· Secondary: Caryophyllene Β· Tertiary: Linalool. Flavour translation from flower to vapour and smoke differs with this terpene combination. Low-temperature vaporisation (180-188Β°C) highlights the caryophyllene and linalool notes whilst keeping myrcene as a foundation. Higher temperatures or combustion flatten the profile into a single-note experience β€” still pleasant, but lacking the complexity that makes this cultivar genuinely interesting to those who appreciate flavour.

Suitability and Recommendations

Who grows A-10 successfully? Indoor growers seeking full control over their harvest timeline. Outdoor cultivators who want to decide exactly when flowering begins. Anyone with the space and patience to vegetate this plant to its full potential before triggering bloom. Difficulty is rated intermediate, meaning a moderate learning curve that rewards attention without demanding laboratory-grade conditions. Delivered UK-wide in discreet, unbranded packaging with germination guarantee included.

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”¬TypeFeminized 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
Feminized 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 UK Commonwealth, state, and territory legislation.
1
A-10 Feminized
royalkingseeds.co.uk
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FB
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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 Feminized 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
8 January 2026Β· 99%+ germination