Harlequin CBD cannabis seeds packaging — Royal King Seeds UK
Cbd
THC 15%
💰 Great Value
CBDFeminisedIn Stock

Harlequin CBD Feminised

Feminised PhotoperiodSee Lab Report →

Grow Harlequin CBD Feminised in the UK. Cbd genetics at 15% THC, known for focused, calm 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 2026-09-06 on 325 seeds.

Germination rate: 99.2% (n=325)
Last QC test date: 2026-09-06
Indoor yield: 320-492 g/m² (avg across 14 verified grower reports)
Outdoor yield: 350-680 g/plant (avg across 9 verified grower reports)

About Harlequin CBD Feminised

Will Harlequin CBD finish outdoors in Britain? Yes, within the April to October season. The balanced genetics cope with what British weather does from one week to the next, from damp air on the west coast to the drier run of counties in the east. Flowering runs 55-60 days, which puts harvest in September or October for most of the country.

What yield is realistic? 500-550 g/m2 indoors is achievable with competent LED lighting and attention to feeding. Outdoors, 300-450 g/plant 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 15% THC with a myrcene-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 Harlequin CBD

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

How does it handle a British summer? Well enough, on hybrid vigour. Keep the root zone under 28°C with mulch or pale pots, and do not transplant into a heatwave. 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 43/57 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 300-450 g/plant — at the price of accepting whatever the autumn does. Flowering: 55-60 days. Indoor yield: 500-550 g/m2. Outdoor yield: 300-450 g/plant. Plant height: 70-90 cm. Rated intermediate difficulty.

Flavour, aroma and effect

Harlequin CBD arrives in stages. The first draw at 15% THC brings a musky earthiness that coats rather than cuts. The focused, calm character follows within minutes, as a head and body effect at once. The mind stays clear while the muscles let go by degrees, which is what makes it adaptable — a small dose carries an afternoon, a larger one turns into an evening. The bisabolol underneath adds a complementary note that fills out the middle.

Terpene breakdown

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

Who it suits

Who does well with Harlequin CBD? 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

🧠Focused
76% of people reported feeling Focused
🧘Calm
67% of people reported feeling Calm
😌Relaxed
58% of people reported feeling Relaxed
🌿Stress Relief
47% of people reported feeling Stress Relief
💊Pain Relief
44% of people reported feeling Pain Relief
😊Happy
38% of people reported feeling Happy
😴Sleepy
38% of people reported feeling Sleepy
💆Body High
24% of people reported feeling Body High
✨Tingling
16% of people reported feeling Tingling

Strain Type

Indica 43%Sativa 57%

Strain Data Sheet

🧬THC15% - 18% (Medium-High)
🌿LineageColombian Gold × Thai × Swiss × Nepali
🔬TypeFeminised Cbd
🌡ClimateTemperate, adaptable
📅HarvestLate Sept – Oct, UK outdoor (typical)
📏Height70-90 cm
⚖️YieldHigh
🏠Yield Indoor500-550 g/m2
🌳Yield Outdoor300-450 g/plant
⏱Flowering Time55-60 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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Harlequin CBD Feminised
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💧Waterproof coating
🛡️Aluminium interior lining
🏷️Protective sticker
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🔢Scratchable serial number

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Harlequin CBD 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
CBD-Stabilised Line (F4) — recessive cannabinoid fixing
Stabilisation Notes — What This Means for Your Grow

CBD-dominance does not stabilise in one or two generations. Harlequin has been progressed through four cycles of selection at Royal King Genetics until the CBD:THC ratio expressed uniformly across the population.

Breeding Goal

Lock CBD-dominance in Harlequin through four rounds of selection.

Selection Focus

Chosen for CBD-dominance, cannabinoid ratio uniformity and a clean therapeutic terpene profile.

Pollen / Mother Source

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

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