Potency for Top 15 Most Popular Dispensary Strains in NorCal This potency information is some of the most frequently requested from our facility. Here are the top 15 best selling dispensary strains in Northern CA for 2010-2015 and their potency range for that time period. You can see the effects of strain mis-identification and confusion in the marketplace with Harlequin that is high THC and you can also see the variation in popular strains such as Girl Scout Cookies with a THC low of 2.2%, representing the CBD-rich phenotype present in the Bay Area.
| Strain | Low | Avg | High |
| Blue Dream | 8.3 | 18.4 | 26.5 |
| Sour Diesel | 7.0 | 17.6 | 26.0 |
| OG Kush | 4.7 | 18.3 | 26.8 |
| Girl Scout Cookies | 2.2 | 18.5 | 27.2 |
| Jack Herer | 5.2 | 17.4 | 24.8 |
| Blackberry Kush | 7.5 | 15.6 | 24.3 |
| Bubba Kush | 8.8 | 16.4 | 29.5 |
| Harlequin | 1.4 | 6.3 | 22.6 |
| GDP | 7.4 | 16.9 | 22.8 |
| Purple Urkle | 11.8 | 17 | 22.8 |
| Fire OG | 10.8 | 19 | 25.8 |
| Headband | 9.3 | 17.9 | 24.5 |
| Purple Kush | 8.8 | 16 | 23.8 |
| L.A. Confidential | 4.9 | 16.4 | 24.6 |
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