Harlequin is a sativa-dominant cannabis strain, commonly traced to Colombian, Thai, Nepali and Swiss genetics, known for a high CBD content and a gentle, clear-headed effect. It is usually credited to a collective of breeders in the late 1990s and early 2000s, though accounts vary. Typical flower carries roughly 6% to 16% CBD alongside about 4% to 10% THC.
Harlequin Strain at a Glance
| Type | Sativa-dominant hybrid |
|---|---|
| Also known as | Harlequin CBD |
| Lineage | Colombian Gold × Thai × Nepali indica × Swiss landrace |
| Breeder / origin | Commonly credited to Mr. Green of the House of David Collective; other accounts credit CBD Crew or other seed companies |
| THC | 4–10% (typical lab range) |
| CBD | 6–16% |
| Dominant terpenes | Myrcene, Pinene, Beta-caryophyllene |
| Aroma and flavor | earthy, mango, musky, sweet mango, earth, citrus |
| Reported effects | clear-headed, relaxed, calm, mildly uplifted |
| Best for | people wanting low-intoxication cannabis, daytime use, new consumers |
| Flowering time | 9–10 weeks |
Where Harlequin Comes From
Harlequin is one of the best-known high-CBD cultivars, and one of the earliest to reach patients in the United States. The most specific origin story credits a breeder called Mr. Green of the House of David Collective, who is said to have crossed landrace sativas from Colombia, Thailand and Switzerland with a Nepalese indica. Other sources name CBD Crew as the breeder and give a date around 2013, so the record is not clean. The Swiss ingredient is often cited as the likely source of the CBD, but that is inference rather than documented fact.
Harlequin became popular in the 2010s as families and patients looked for cannabis that was less intoxicating. It has since been crossed with other lines. Harlequin GDP, for example, pairs it with Granddaddy Purple, and its CBD traits show up in many modern high-CBD hybrids.
Harlequin Effects: What It Feels Like
Harlequin is usually described as clear and calm. With a CBD-dominant ratio often around 2:1 to 5:1 over THC, there is some mild uplift and a loosened body, but most people stay focused and functional. Racing thoughts are less common than with high-THC sativas.
Because THC is low, the experience is mild for most, and it is a frequent suggestion for daytime use or for new consumers. Sensitive people can still feel a little dizzy or foggy at larger doses, so start with a small amount and wait. Ratios vary between cuts, so read the lab label rather than assuming the numbers.
Harlequin Terpenes, Aroma and Flavor
Harlequin smells earthy and musky with a sweet, tropical edge that many people compare to mango. Grinding the flower brings out more citrus and a touch of spice. The taste is mild and sweet on the inhale, with an earthy, woody exhale.
Myrcene commonly leads in lab reports, with pinene and caryophyllene often following. These terpenes account for the herbal, piney and peppery notes, and the myrcene supports the mellow body feel.
- Myrcene: earthy, musky and herbal, also found in mango and hops
- Pinene: fresh pine, also found in pine needles and rosemary
- Beta-caryophyllene: peppery and spicy, also found in black pepper and cloves
Terpene levels vary from grower to grower and batch to batch, so check the lab label on the package. Learn more in our guide to cannabis terpenes.
Side Effects and How to Use Harlequin
Side effects are generally mild. Dry mouth and dry eyes are the most common, and some people feel slightly sleepy or dizzy, particularly at larger doses. CBD can interact with certain medications, so anyone on prescriptions should check with a doctor or pharmacist first.
With Harlequin, as with any strain, a smaller dose usually avoids anxiety or grogginess. Our cannabis safety guide covers what to do if you take too much.
Do People Use Harlequin for Medical Reasons?
People commonly reach for Harlequin when they want to ease stress, muscle tension or everyday aches without a strong high. Reviewers also mention it for anxious days and for mild inflammation. These are user reports, not medical claims, and anyone with a condition should speak with a clinician.
These are user reports, not clinical findings. For what research actually supports, see our cannabis health and research section, and talk to your doctor before using cannabis for a health condition.
Growing Harlequin
- Difficulty: Moderate
- Flowering: 9–10 weeks
- Yield: Moderate
- Height: Medium to tall
- Environment: Indoor or warm outdoor; does well in a greenhouse
Harlequin is a sativa-leaning plant that stretches in flower, so topping and trellising help indoors. Cannabinoid ratios can vary between seed-grown plants, so growers wanting reliable CBD usually work from a verified clone. Outdoors it finishes in early to mid October, so Pacific Northwest growers should watch for bud rot in wet autumn weather.
Home-grow rules depend on the state: adults can grow at home in states such as California (six plants per residence), Michigan (12 per residence) and Oregon (four per household), while Washington and Illinois allow home growing only for registered medical patients. Check your state in our cannabis laws by state guide before you plant anything.
Strains Like Harlequin
- ACDC: an even higher CBD-to-THC ratio with a similar clear feel
- Cannatonic: another early high-CBD standard with a gentle effect
- Harlequin GDP: Harlequin crossed with Granddaddy Purple for a more relaxing finish
- Charlotte’s Web: a famous CBD-rich strain with minimal intoxication
- CBD Charlotte’s Angel: a CBD-forward relative with a calm daytime profile
Browse more sativa strains, the full strain directory, or our guide to cannabis strains.
More Sativa Strains to Explore
Hawaiian Haze · Hawaiian Snow · Haze Berry · Harlequin GDP · Guava · Green Lantern · All sativa strains
Where to Buy Harlequin
Dispensary menus change every week, and Harlequin may be sold under its own name, as a cross or as a pre-roll or vape. The fastest way to find it is to check store menus online before you go. In Los Angeles, browse Los Angeles dispensaries and check the menus at stores like Cana Silver Lake and HOOVER HOUSE. In Detroit, browse Detroit dispensaries and check the menus at stores like Dank Garden and Cloud Cannabis Detroit. You can also browse licensed dispensaries in every state we cover. Adults 21 and older can buy with a valid photo ID; see cannabis laws by state for purchase limits.
Harlequin FAQ
Is Harlequin indica or sativa?
Harlequin is a sativa-dominant hybrid. Its genetics lean on Colombian and Thai sativas with a Nepalese indica.
How much CBD does Harlequin have?
Many lab results fall between about 6% and 16% CBD, with THC around 4% to 10%. Ratios of roughly 2:1 to 5:1 CBD to THC are typical.
Will Harlequin get you high?
A little. Most people feel calm and clear rather than strongly intoxicated, though the effect depends on the THC level of the batch.
What does Harlequin taste like?
Earthy and sweet, often with a mango or citrus note.
Who bred Harlequin?
It is often credited to Mr. Green of the House of David Collective, but other sources name different breeders, so the origin is not firmly documented.
Is Harlequin good for beginners?
It is one of the gentler options because of its low THC and high CBD. A small dose is still wise for anyone new to cannabis.
For adults 21+ in legal states. Strain information reflects breeder descriptions, lab data and user reports; effects vary by person and batch. Not medical advice.
