Best High THC Cannabis Strains

High THC cannabis strains test at 25% THC or higher. Lab reports measure THC and THCA. THCA converts to THC when heated. Most dispensary flower tests between 15% and 25% THC. Strains above 25% are rare. The strains below have lab data from multiple sources.

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Top pick: Original Glue (GG4)

Original Glue averages 25% to 28% THC. Some samples test 30%. The strain is a hybrid. Parents: Chemdawg, Sour Diesel, and Chocolate Diesel. Dominant terpenes: caryophyllene, limonene, and myrcene. Effects: sedation, body. Flower density: high. Yield: high for growers.

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Runner-up: Bruce Banner

Bruce Banner tests 24% to 29% THC. It is sativa-dominant. Parents: Strawberry Diesel and OG Kush. Terpenes: myrcene, pinene, and caryophyllene. Effects: cerebral, energetic. Flower time: 8 to 10 weeks. Lab data from California and Colorado shows consistent potency.

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Also consider: Wedding Cake

Wedding Cake tests 25% to 27% THC. It is indica-dominant. Parents: Triangle Kush and Animal Mints. Terpenes: limonene, caryophyllene, and myrcene. Effects: relaxed, appetite increase. Flavor: sweet, peppery.

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Also consider: Chemdawg

Chemdawg tests 24% to 27% THC. It is a parent of many high THC strains. Terpenes: caryophyllene, limonene, and pinene. Effects: balanced, euphoric. The strain dates to the 1990s. It remains a benchmark for potency.

How to compare high THC strains

THC percentage ranges

Low: under 10% THC. Medium: 10% to 20% THC. High: 20% to 25% THC. Top range: above 25% THC. A 2016 study in Biological Psychiatry found average THC in seized cannabis rose from about 4% in 1995 to about 12% in 2014. Modern breeding pushed top strains past 30% THC in some lab tests.

Check the lab report for each batch. THC numbers change by grower and harvest. Buy from licensed brands with third-party testing.