Arctic Sun cannabis seeds packaging — Royal King Seeds UK
Sativa
THC 22%
🎨 Creative
SativaFeminisedIn Stock

Arctic Sun Feminised

Feminised PhotoperiodSee Lab Report →

Arctic Sun Feminised cannabis seeds for UK growers. Sativa · 22% THC · energetic, calm. Discreet UK delivery, priced in GBP.

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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 2026-09-08 on 175 seeds.

Germination rate: 98.4% (n=175)
Last QC test date: 2026-09-08
Indoor yield: 360-528 g/m² (avg across 12 verified grower reports)
Outdoor yield: 510-846 g/plant (avg across 7 verified grower reports)

About Arctic Sun Feminised

Will Arctic Sun finish outdoors in Britain? Yes, within the April to October season. Expect height and expect it early; the long midsummer days at these latitudes suit the plant. Give it room to stretch and tie it down rather than fighting it. Flowering runs ±66 days, which puts harvest in September or October for most of the country.

What yield is realistic? 450 gr/m² indoors is achievable with competent LED lighting and attention to feeding. Outdoors, 450 grams 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 limonene-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 Arctic Sun

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 sativa performs in both; the choice is about what you want out of it.

How does it handle a British summer? Better than most, because the open structure lets heat out. In a genuine heatwave you may see midday droop, with recovery by evening. Thirty per cent shade netting takes the edge off without costing you much growth. 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 24/76 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 450 grams — at the price of accepting whatever the autumn does. Flowering: ±66 days. Indoor yield: 450 gr/m². Outdoor yield: 450 grams. Rated intermediate difficulty.

Flavour, aroma and effect

Arctic Sun arrives in stages. The first draw at 22% THC brings a bright citrus edge that lifts off the palate immediately. The energetic, calm character follows within minutes, arriving as sharpened attention. Colour reads brighter, music reads busier, and conversation wanders further than it would otherwise. It holds for two to three hours on a plateau rather than a spike. The pinene underneath adds an alertness that keeps thinking crisp.

Terpene breakdown

Primary: Limonene · Secondary: Pinene · Tertiary: Terpinolene. 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. Limonene anchors the aroma, pinene occupies the middle, and terpinolene sits behind both — which is the part that separates this strain from others sharing its primary terpene.

Who it suits

Who does well with Arctic Sun? 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

🤑Energetic
71% of people reported feeling Energetic
🧘Calm
67% of people reported feeling Calm
😊Happy
58% of people reported feeling Happy
🤩Creative
56% of people reported feeling Creative
😎Uplifted
45% of people reported feeling Uplifted
🤗Euphoric
40% of people reported feeling Euphoric
🧠Focused
35% of people reported feeling Focused
🗣️Talkative
23% of people reported feeling Talkative
💪Motivated
24% of people reported feeling Motivated

Strain Type

Indica 24%Sativa 76%

Strain Data Sheet

🧬THC22% - 26% (High)
🌿LineageSativa-Dominant Hybrid (Undisclosed Lineage)
🔬TypeFeminised Sativa
🌡ClimateWarm / Mediterranean, long season
📅HarvestLate Sept – Oct, UK outdoor (typical)
📏Height120 – 200 cm (typical)
⚖️YieldTypical for type
🏠Yield Indoor450 gr/m²
🌳Yield Outdoor450 grams
⏱Flowering Time±66 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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Arctic Sun Feminised
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💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
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🔢Scratchable serial number

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Arctic Sun 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
F4
Generations
4+
Breeding Programme
Royal King Genetics Filial Programme — four-generation pheno fixing
Stabilisation Notes — What This Means for Your Grow

Arctic Sun runs through our F4 programme. Four cycles of phenotype selection have removed the worst of the trait variation; what is left is a tight, predictable population for production.

Breeding Goal

Pin high-energy terpene expression consistency across the Arctic Sun population.

Selection Focus

Chosen for trichome density, sativa branching architecture and an energising terpene expression.

Pollen / Mother Source

Royal King Genetics select-mother programme — pollen drawn from an internally maintained reversed-female line.

Last Batch QC Verified
2 September 2026· 99%+ germination