Harlequin

Overview

Harlequin is a pioneering sativa-dominant hybrid that played a transformative role in introducing balanced CBD:THC cannabis to medical dispensaries across the United States. Developed by the legendary breeder Mr. Green of the International Cannabis Association, Harlequin was among the first commercially available strains to reliably produce CBD-rich flowers with a consistent 5:2 CBD-to-THC ratio. This balanced cannabinoid profile — typically 8–16% CBD alongside 4–10% THC — produces a unique therapeutic experience: the CBD moderates and softens the psychoactive effects of THC, resulting in clear-headed, functional relief that is distinctly different from high-THC varieties. The genetic lineage of Harlequin is as rich and diverse as its cannabinoid chemistry, drawing from Colombian Gold, a Nepali Indica, Swiss Sativa, and a Thai landrace strain. This multi-continental heritage contributes to the strain's complex terpene architecture and resilient growth characteristics. Harlequin plants exhibit classic sativa morphology, growing tall with elongated colas and broad canopies that respond well to low-stress training (LST) and SCROG techniques to manage height and optimize yields. The flavor profile is earthy and mango-forward with sweet herbal and woody undertones, producing an enjoyable sensory experience alongside its therapeutic properties. Terpenes including myrcene, caryophyllene, and pinene underpin Harlequin's well-documented anti-inflammatory, analgesic, and anxiolytic properties, and the strain has been widely used to address chronic pain, arthritis, migraines, anxiety, depression, and PTSD. Unlike many ultra-high-CBD strains, Harlequin retains enough THC to activate CB1 receptors meaningfully, providing a synergistic effect that enhances pain relief through the entourage effect. Patients consistently report remaining clear-headed, creative, and socially engaged while experiencing significant symptom relief, making Harlequin one of the most versatile medical strains in existence.

Effects

Terpenes

Genetics