Short answer
In 2024 the top THC numbers on retail flower labels ran between 28 and 32 percent. Names that appeared at the top of menus: Permanent Marker, GMO (Garlic Cookies), Bruce Banner #3, Gorilla Glue #4, Grease Monkey, Kush Mints, MAC 1, Jealousy, and Wedding Cake. Breeders claim more. Anesia Seeds lists Future #1 at 37 percent. Dispensary lab reports sit below that.
What the label number means
Flower holds THC in acid form. THCA turns into THC when heat is applied. Labs report total THC with this formula: THC + (THCA x 0.877). A jar that tests 30 percent THCA yields about 26 percent total THC after decarboxylation. Read the total THC line, not the THCA line.
strongest high thc strains 2024
Testing methods differ. High-performance liquid chromatography is the standard. Sample selection matters. A lab that takes one bud from the top of the plant reports a higher number than a lab that grinds a whole-plant sample.
High THC Strain Names and THC Percentages Guide
Potency rose for decades. One analysis of U.S. samples found flower THC went from about 4 percent in 1995 to 12 percent in 2014. Concentrates went from 12 percent to more than 50 percent in the same span. Retail flower in 2024 runs above both.
strongest high thc strains 2024
Strains and reported numbers
- Permanent Marker: 28 to 32 percent THC. Seed Junky Genetics crossed Biscotti with Sherb Bx.
- GMO (Garlic Cookies): 27 to 30 percent. Chemdawg x Girl Scout Cookies, from Mamiko Seeds.
- Bruce Banner #3: 25 to 29 percent. Strawberry Diesel x OG Kush, from Dark Horse Genetics.
- Gorilla Glue #4: 25 to 28 percent. Chem Sister x Sour Dubb x Chocolate Diesel.
- Grease Monkey: 27 to 30 percent. Gorilla Glue #4 x Cookies and Cream, from Exotic Genetix.
- Kush Mints: 26 to 30 percent. Bubba Kush x Animal Mints, from Seed Junky Genetics.
- MAC 1: 25 to 30 percent. Alien Cookies x Starfighter, from Capulator.
- Jealousy: 27 to 30 percent. Sherbert x Gelato 41, from Seed Junky Genetics.
Those ranges come from breeder listings, dispensary menus, and third-party lab reports. One cut can test 24 percent at one lab and 30 percent at another.
Concentrates and vapes
Distillate and live resin cartridges test 70 to 90 percent THC. Rosin and hash sit between 50 and 80 percent. A 1-gram cartridge at 85 percent holds about 850 mg of THC. That is more than 3 grams of 28 percent flower.
Why the top number sells
Menus sort by THC percentage. A shopper with two minutes and no strain knowledge picks the highest number on the screen. The percentage acts as a shortcut that replaces research. Pre-roll packs, single-serve gummies, and 1-gram vapes run on the same logic: one decision, no reading. Potency became the label that carries the purchase.
State caps
Connecticut rules list a 30 percent THC cap on retail flower and a 60 percent cap on concentrates. Vermont lists the same two numbers. A cultivar labeled 32 percent cannot be sold in those states. Growers there select for terpene content, yield, and mold resistance instead of the top number.
What the percentage does not measure
THC percentage does not measure terpenes, moisture, or cure. Two samples at 28 percent can produce different effects. Dry flower loses potency. A jar held at 62 percent relative humidity keeps better than a dry one. Harvest date, storage, and trim change the result in the pipe.
How to compare two jars
- Check the total THC line and the test date.
- Check the harvest date. Flower older than 6 months loses potency.
- Check terpene content in milligrams per gram, when the label lists it.
- Check the state cap. Numbers above 30 percent in capped states point to a different market or a different product type.