Harlequin Strain Autoflower CBD SeedsThe classic CBD-rich sativa, bred to flower on its own
5.00 out of 5 · 2 reviewsThe Harlequin strain is one of the best-known CBD-rich cannabis varieties, a sativa-dominant blend of Colombian Gold, Thai and Swiss sativas with a Nepali indica that usually tests with more CBD than THC. This autoflowering CBD version adds ruderalis genetics, so its female plants bloom by themselves and finish roughly 10 to 12 weeks from seed. Photoperiod Harlequin is reported at about 5:2 CBD:THC.
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What is the Harlequin strain?
Auto CBD Harlequin is an autoflowering, CBD-rich version of Harlequin, the sativa-dominant strain descended from Colombian Gold, Thai and Swiss sativas and a Nepali indica. Photoperiod Harlequin is known for a CBD:THC ratio of about 5:2, according to NorStar Genetics and MSNL, and ruderalis genetics let this version bloom without 12-hour nights. Autoflowering Harlequin lines are thinly documented, but one published listing gives about 13% CBD with under 0.5% THC and a 75–80 day life cycle.
Ratio for photoperiod Harlequin from NorStar Genetics, MSNL and AllBud; the ruderalis share of auto versions isn't published.
Harlequin is one of the few classic strains that reliably produces more CBD than THC, which gives it a clear, mild character in user reports.
Harlequin strain specs
Harlequin's ratio, genetics and flavor come from the photoperiod strain (NorStar Genetics on SeedFinder, MSNL and AllBud). Autoflowering Harlequin is far less documented, so the timing, height and yield rows combine the one auto Harlequin CBD listing we found with what is typical for sativa-leaning CBD autoflowers, and each row says which is which.
| Type | Sativa-dominant CBD autoflower; photoperiod Harlequin is about 75% sativa / 25% indica |
|---|---|
| Genetics | Harlequin (Colombian Gold × Thai × Swiss sativa, with a Nepali indica) × ruderalis |
| Bred by | Original Harlequin breeder not documented; seed lines from NorStar Genetics, MSNL and others; the auto line's breeder isn't published |
| CBD:THC | About 5:2 in photoperiod Harlequin (NorStar, MSNL); one auto Harlequin CBD listing claims about 13% CBD to 0.2–0.4% THC |
| THC / CBD | Photoperiod: THC up to 10% and CBD up to 18% (MSNL); AllBud lists 7–15% THC and 4–10% CBD |
| Main terpenes | Myrcene, caryophyllene, pinene |
| Aroma & flavor | Earthy musk, sweet mango, herbs, pine, light pepper |
| Reported effects | Clear-headed, calm, alert, mildly uplifting |
| Seed type | Autoflower feminized (female plants that bloom by age) |
|---|---|
| Seed to harvest | About 10–12 weeks, typical for sativa-leaning CBD autos; one auto Harlequin CBD listing gives 75–80 days |
| Outdoor harvest | About 2.5 to 3 months after sowing, with sowings from late spring to midsummer |
| Height | Around 80–100 cm (2.6–3.3 ft) indoors and 130–140 cm (4.3–4.6 ft) outdoors on the one published auto listing |
| Yield | That listing claims 400–500 g/m² indoors (about 1.3 to 1.6 ounces per square foot); read it as an upper estimate |
| Difficulty | Easy to moderate |
| Best methods | Sowing in the final pot, early LST, no late topping |
| Climate | Indoors, or warm, sunny gardens; the sativa side likes heat and light |
Where does the Harlequin strain come from?
Harlequin is a sativa-dominant strain built from old landrace lines: Colombian Gold, a Thai sativa and a Swiss sativa, with a Nepali indica in the mix according to NorStar Genetics. Its original breeder was never clearly recorded. Harlequin made its name as a CBD-rich plant, and NorStar Genetics says it nearly always settles at a CBD:THC ratio of about 5:2, the trait that made it one of the most widely grown high-CBD strains.
Auto CBD Harlequin adds ruderalis, a hardy cannabis type that flowers once the plant is old enough rather than when nights lengthen. Who first made the auto version, and which auto partner it uses, isn't published, and autoflowering Harlequin CBD lines report different balances: one listing claims around 13% CBD with only 0.2–0.4% THC, far more CBD-heavy than the photoperiod's 5:2. Expect CBD to lead, but read any exact ratio as an estimate.
What CBD:THC ratio does Harlequin have?
Photoperiod Harlequin is usually described as about 5:2 CBD to THC, meaning roughly two and a half parts CBD for every part THC. MSNL lists up to 18% CBD and up to 10% THC, while AllBud's figures (7–15% THC and 4–10% CBD) sit closer to 1:1, which shows how much individual plants and tests vary. Autoflowering Harlequin CBD lines may lean further toward CBD, but the exact balance of this auto version isn't published.
A ratio is not a promise. CBD and THC levels shift with phenotype, growing conditions and harvest timing, so only a lab test of your own buds gives a real number.
What does Harlequin taste like, and how does it feel?
Aroma and flavor
Harlequin smells and tastes earthy and musky with a sweet mango note, plus herbal, pine and light pepper tones. NorStar Genetics describes a range from earthy musk to sweet mango, and AllBud adds citrus and woody notes.
- Earthy
- Mango
- Herbal
- Pine
- Citrus
- Pepper
Terpenes
- Myrcene
- Earthy, musky fruit; listed first by MSNL
- Caryophyllene
- Peppery, spicy note
- Pinene
- Fresh pine and herbal edge
Terpene data for autoflowering Harlequin isn't published; these three come from MSNL's photoperiod Harlequin listing.
Reported effects
Users mostly describe Harlequin as clear-headed and calm, with a gentle, alert lift rather than a heavy high. NorStar Genetics calls the effect relaxed without sedation, and AllBud reviewers mention focus, creativity and a mild body feel; the large CBD share is why Harlequin is reported to feel milder than THC-dominant sativas.
- Clear-headed
- Calm
- Focused
- Uplifted
- Creative
Harlequin's reported downsides are dry mouth and dry eyes, and a few AllBud reviewers mention slight nausea or a headache after heavier use.
These Harlequin effects summarize AllBud user reports and NorStar Genetics' description of the photoperiod strain; no separate effect reports have been published for the auto version. Everyone responds in their own way, and nothing here is medical advice.
How do you grow Harlequin seeds?
Auto CBD Harlequin seeds grow best with a light touch: sow each seed in its final pot, give the plants 18 or more hours of light a day for the whole grow, bend the taller sativa branches early instead of cutting them, and expect a harvest roughly 10 to 12 weeks after sprouting.
- GerminateDays 1–7
Sow Auto CBD Harlequin directly in a 15–20 L (4–5 gal) pot; its sativa side appreciates a little more root room than a compact indica auto.
- Early growthWeeks 2–4
Harlequin grows long, narrow sativa leaves. Start low-stress training around week three to keep the main stem from racing ahead.
- FlowerWeeks 4–11
Flowers appear without any light change. Expect longer, airier buds than on an indica auto, with the stretch slowing by mid-bloom.
- HarvestWeeks 10–12 from seed
Harvest when most trichomes are cloudy. The CBD:THC balance is set mainly by genetics, so timing changes the character more than the ratio.
Grow tips for Harlequin
- Give the sativa headroom. Harlequin is about 75% sativa, so even in auto form it can stretch more than indica autos; leave space above the canopy and tie down the tallest tops early.
- Don't top late. An autoflower has little time to recover, so shape Auto CBD Harlequin by bending branches in the first weeks rather than cutting the main stem.
- Keep the days long. Auto CBD Harlequin blooms by age, so dropping the light to 12 hours only reduces the energy it gets; stay on 18/6 or longer.
- Feed with restraint. Sativa-leaning autos burn easily under strong nutrients; begin with a mild feed and watch the leaf tips before raising it.
- Lab-test if the ratio matters. Harlequin plants vary in their CBD:THC balance, so if you want a known ratio, send a sample of your dried buds to a testing lab.
- Choose warm, sunny spots outdoors. With Colombian and Thai sativa ancestry, Harlequin does best in full sun and warmth; sow outdoors once nights stay mild and harvest about three months later.
Is Harlequin the right strain for you?
Great pick if you
- Want a CBD-rich strain with more CBD than THC
- Prefer a clear, mild effect over a heavy high
- Want a fast, compact grow with no light change
- Like earthy, mango and herbal flavors
Think twice if you
- Want a high-THC, strongly intoxicating strain
- Need a guaranteed, lab-certified CBD:THC ratio
- Want to take clones (autoflower cuttings flower right away)
- Want a heavy, sleepy nighttime indica
Harlequin strain FAQ
Is Harlequin indica or sativa?
Harlequin is a sativa-dominant strain, about 75% sativa and 25% indica according to NorStar Genetics, MSNL and AllBud. The autoflowering version adds ruderalis genetics, but keeps Harlequin's sativa-leaning growth and clear-headed character.
What is Harlequin's CBD to THC ratio?
Photoperiod Harlequin is best known for a CBD:THC ratio of about 5:2, as NorStar Genetics and MSNL report, though test results vary and AllBud's numbers sit closer to 1:1. The ratio for this autoflowering line isn't published; one auto Harlequin CBD listing claims far more CBD than THC.
Does Auto CBD Harlequin get you high?
Auto CBD Harlequin contains some THC, so it can produce a mild effect, but users describe Harlequin as much clearer and gentler than THC-dominant strains because CBD outweighs THC. How noticeable it is depends on the plant's actual ratio and how much you use.
How long does Auto CBD Harlequin take to grow?
Expect roughly 10 to 12 weeks from seed to harvest, which is typical for sativa-leaning CBD autoflowers; one published auto Harlequin CBD listing gives 75 to 80 days. Flowering starts on its own, so the light schedule never has to change.
What are Harlequin's parents?
Harlequin descends from landrace genetics: Colombian Gold, a Thai sativa and a Swiss sativa, with a Nepali indica according to NorStar Genetics. The autoflower version adds ruderalis. The original Harlequin breeder was never clearly documented.
How tall does Auto CBD Harlequin grow?
The one published auto Harlequin CBD listing gives about 80–100 cm (2.6–3.3 ft) indoors and 130–140 cm (4.3–4.6 ft) outdoors. Because Harlequin leans sativa, plants may stretch more than compact indica autos, so leave some headroom.
How is Auto CBD Harlequin different from photoperiod Harlequin?
Photoperiod Harlequin needs 12-hour nights to bloom and flowers for about 60 to 70 days after a veg period, growing into a tall sativa. Auto CBD Harlequin starts flowering by itself, stays smaller and finishes the whole grow in roughly 10 to 12 weeks.
What does Harlequin taste like?
Harlequin tastes earthy and musky with sweet mango, herbal and pine notes and a light peppery finish. AllBud also lists citrus and woody flavors, and MSNL names myrcene, caryophyllene and pinene as its main terpenes.
Harlequin reviews
5.00 out of 5 from 2 reviews
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2 reviews for Auto CBD Harlequin Strain Marijuana Seeds
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Auto CBD Blueberry StrainBeaver Seeds sells cannabis seeds for collection and genetic preservation where permitted. Check the laws in your state, province or country before germinating seeds. Effects are user-reported and are not medical claims.
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Calvin Myers –
Everything has gone really well, from planting to harvesting, from ordering to delivery. Not a single issue! Also, the customer service is excellent. This strain is really outstanding!
Lucas –
This strain is absolutely amazing! Everything from ordering to delivery, planting to harvesting, has been fantastic. No problems at all! Customer service is top-notch too. This is my second time buying and I can’t wait for my next batch of seeds!