Harlequin is a special strain for many reasons. A diverse parentage, this hybrid has the best of all worlds, not to mention its solid CBD levels and ability to cure many pain conditions. This is what makes this strain indispensable, and what will continue to make it a popular sativa for recreational and medical users alike.

This sativa-dominant strain has a very interesting parentage. Harlequin is a descendant of Colombian Gold, Thai and Swiss landrace sativas and a Nepali indica. This special combination is sure to deliver a clean and energizing high, that is guaranteed to provide the best of all sativa effects.

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Harlequin is an ultra-diverse combo hybrid, that is just brimming with all sorts of superpowers. This hybrid just boasts of a really high CBD level, around 10-15%, which is a clear indicator of its medicinal abilities. This is what makes this strain a favorite among doctors who are looking to prescribe something potent for the fight against chronic pain.

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Harlequin weed strain attributes:
ORIGINColombian Gold, Thai sativa, Nepali indica mixed with Swiss Sativa
EFFECTSRelaxed – 10
Happy – 9
Uplifted – 8
Focused – 8
Energetic – 6
FRAGRANCECitrus, earthy, mango, sweet
FLAVORSEarthy, woody, spicy, herbal
Dry eyes – 6
Dizzy – 3
Anxious – 3
Headache – 2
MEDICALPain – 10
Stress – 9
Depression – 6
Inflammation – 5
Headaches – 4
CBD %10%-15%
INDICA/SATIVA %25% / 75%
INDOOR YIELD25 ounces per square meter
OUTDOOR YIELD21 ounces or more per plant
CLIMATEWarm but not too warm, and humidity around 50%

* 10 is the highest
* 1 is the lowest


This powerful hybrid is a great smoke for when you are looking to find some mental release, without feeling tired. Harlequin has inherited all its positive effects from its parentage. This strain is a great relaxant, with an ability to calm the mind, and allow you to stay focused and on point.

up close view of harlequin strain dense bud
Harlequin Strain Effects

Harlequin is first and foremost uplifting and a happiness-inducing bud. This sativa dominant strain will let you keep your functionality 100%, meaning it is the perfect smoke to start a day with, because instead of slowing you down, this strain may actually help you get stuff done, and get it done while feeling inspired and creative.

Harlequin will turn you into a ball of energy, and let you be social and forward-thinking, all while feeling invigorated and brimming with ideas.


Harlequin is great at keeping you focused, and will let have you completing your usual tasks with more accuracy and vigor.

Harlequin terpenes

Harlequin has an exquisite terpene profile dominated by myrcene. There are a lot of other terpenes that this deliciously-tasting strain contains including α-Bisabolol, β-Pinene, caryophyllene and phellandrene.

Aroma & Flavor

Harlequin is a sweet-smelling plant, that will fill the room with a pleasant and natural aroma. It’s not particularly strong smelling, which is perfect because its earthiness isn’t overwhelming, it is just right. This hybrid will leave a gentle whiff of fresh tropical mangoes in the air.

This hybrid has a very strong herbal flavor, that is cut in with some spiciness. Harlequin tastes mostly earthy, mixed in with fresh pine notes. This strain’s smoke has a creamy, woody flavor to it that is both pleasant and invigorating.

Dominant terpene:

Myrceneearthy, musky, fruity, clover, hop, pungent

Secondary terpenes:

α-Bisabololfresh, herbal, spicy, chamomile, balsamic, sweet, floral
β-Pinenedill, parsley, basil, hops, wood, pine
Caryophyllenespicy, cinnamon, clover
Phellandrenemint, lime, citrus, herbal, floral, wood

Adverse reactions

Harlequin has a few adverse effects, mostly relating to its potency. This is why sometimes you may experience a little dizziness when smoking this particular strain. This dizziness may also lead to a slight feeling of anxiety and mild paranoia

This hybrid can make you feel slightly parched, giving you a sensation of a dry mouth, and also dry eyes. Harlequin can also sometimes give you a slight headache on the comedown, although this is something that doesn’t occur very often.


Harlequin is a vigorous painkiller, all thanks to its way-above-average CBD levels. This hybrid has proven to be very successful at nixing common pains such as migraines, headaches, muscle spasms and joint pains, and is therefore very highly recommended by doctors for their long-suffering patients.

trichomes on Harlequin weed bud
Harlequin Strain Medical

This hybrid is also talented in the stress department. Harlequin is a great mood-altering smoke. This is why it provides great support to patients who suffer from chronic stress and all its debilitating symptoms.

Depression and anxiety stand no chance against this mood-elevator, because of its ability to conjure up the happy vibes. Harlequin is also perfect for the treatment of inflammation, such as joint pains, because it is a strong anti-inflammatory agent, and will rid you of those aches and pains instantly.

Download my free marijuana grow guide and start growing Harlequin strain


Harlequin produces notoriously high CBD levels, and if this is what you are aiming for, then it is recommended to harvest this pretty flower early. This hybrid is usually covered in a thick layer of trichomes when it is ripe for plucking.

Harlequin cannabis plant in the 11th week of growing
Harlequin Strain Growing

Humidity needs to be controlled well, and in indoor settings, Harlequin needs appropriate trimming to allow a healthy airflow. This plant likes warmth, but don’t go crazy on the heat so she doesn’t wither and dry up.

Flowering Time


This strain takes an estimated of 8 to 9 weeks to flower and be ready for a harvest. Harlequin can reap an average of about 25 ounces per square meter, of good, potent bud.


Harlequin is relatively easy to cultivate, as long as you pay close attention to the humidity levels, which should not exceed the recommended 50%. This hybrid can yield an average of about 21 ounces per plant during harvest.


  1. Nepali Indica
  2. Thai Sativa
  3. Colombian Gold
  4. Swiss Sativa

FAQ About Harlequin Strain

What is the Harlequin strain yield?

Harlequin yields 25 ounces per square meter indoors and 21 ounces or more per plant outdoors.

How much THC does Harlequin strain have?

From 7% to 15%

What are the origins of the Harlequin strain?

Harlequin was created by mixing Colombian Gold, Thai sativa, Nepali indica and Swiss Sativa together.

Have you ever smoked or grown your own Harlequin? Please let me know what you think about this marijuana strain in the comments below.


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Mr Robert Bergman PhD


Robert Bergman is an Amsterdam-based marijuana grow expert who has years of experience from small grows to massive operations ... See profile

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21 comments on “Harlequin”

  1. Hi Vince,

    Thanks for your comment. Unfortunately, we are no longer able to ship to Australia. We’re very sorry about this!

    Kind regards,

  2. Hi Tony,

    Thanks for your message. It kind of depends on what you are particularly using it for. But CBD has some serious therapeutic benefits, and a strain that has balanced THC and CBD levels definitely has some extra benefits to it. And CBD also mitigates THC’s psychoactive effects, so it won’t get you as high as normal Cannabis would and is far less likely to cause any unwanted side effects.
    Our 1:1 THC to CBD strains are: Critical Mass CBD (fem) and White Widow CBD (fem).

    We hope this helps!
    Kind regards,

  3. I have read where medical cannabis that has almost an even CBD to THC ratio is better for the patient. If true, do you have a list of these?

  4. I’ve seen a few places offering feminized Harlequin seeds, are these going to be essentially re-breeding from the other 4 strains, and any hints on how to obtain clones?

  5. Just got harlequin seeds from you folks.
    If it is a clone only strain, what is the true nature of the seeds I purchased ?

  6. Ang, Yes. Harlequin is a clone only strain. The originator of the strain passed away in 2014 and his buddy is cloning the Mother for all.

  7. Is it true that Harlequin is a clone-only strain, meaning that in order to cultivate it, and you’d need to obtain clippings from a mature plant? I’ve purchased seeds from a distributor, and now I’m wondering…

  8. By the way, thank you for the Widow pack, our Black widow is growing like a champ. If you were to expand your collection I would love not just HarleyQuinn but Sour Tsunami as well. I fell in love with Harley-tsu and it works wonders for insomnia and body pain.

  9. Steve,

    Yes and yes…The 8-9 weeks is an approximate timeline. Not meant to be to the day. Harvest by trichomes. Hope this helps. 🙂

  10. Hi
    When you say 8-9 weeks to flower with indoor growing do you mean from the first signs of white hairs or from when you switch to 12/12 lighting?

  11. I have a 15 plant med grow in WA. One of my girls is a Harley-cross. She (along with the others) is a heavy feeder 8 weeks into veg. We have another 12 weeks before before the natural light flip. With about 20 weeks of veg, i should have a pretty good framework for flowers. Most of my outdoor ladies in the past have provided 1.5-2.5 pounds of dry meds a piece. I’ll try to get you an update at the end of the season.

  12. I am.growing a strain of Harliquin i crossed with TUT, it buds look more like Harley, its aroma is sweet pungent, almost enchanting. I use a special.formula throughout the grow, my own mix. I surpised.at how how lovely it smells, i thought i was to close to it, so invited about 5 people to take a smell, the grow smell reviews are great.

    I dropped about 2 seeds and 2 grow in the pot from last year harvest. I find that my cross, I am calling HGQuin, loves outdoor, natural light, grows 2 to 5 times in size if grown outdoor in a super large pot with.room for it roots. The roots tend to require more room than other strain I have grown. Germination was intetesting the seed membrane grows around the first set of leaves until.all four leaves pop at once. The seed membrane draws back to one leaf falling off after a week.

  13. I would LOVE it if you started carrying Harlequin seeds! I’m a medical patient who recently discovered the strain at my local dispensary … and I would LOVE to add it to my own garden. I have PTSD, suffer from a ruptured disc in my back, and have constant migraines … plus, I’ve been unable to take more than 85% of the prescription drugs they’ve tried to give me, thanks to horrible side effect ….. and I’ve gotten more/better results from a Harlequin “1:1” strain (with roughly equal THC and CBD, both in the 10% range) than I’ve gotten from any strain EVER!!!! PLEASE!! I WANT SEEDS!!! 🙂

  14. Been growing H. for about a year. Indoor and out. Indoor is better. Use the outdoor for coconut oil. 5 different H’s going now for cloning. Can send pictures. Thanks for your post.