| Hi-Octane OG | Happy Dreams Genetics | | 60/40 | View variety |
| Hibachi Supreme (Tokyo Snow lineage, Compound Genetics) | Unknown | | Unavailable | View variety |
| Hibiscus Sunrise | Colorado Seed Inc. | | 50/50 | View variety |
| Hickok Haze | Greenpoint Seeds | | 60/40 | View variety |
| Hidden Pastry | Seed Junky Genetics | Unknown Strain · [unknown Secret Cookies] × Kush Mints | 60/40 | View variety |
| HIFi | ThugPug Genetics | | 60/40 | View variety |
| HiFi 4G | Dutch Passion | | 60/40 | View variety |
| Higgs Boson | Goldenseed | Cinderella 99 · C99 · [Grapefruit pheno] × C99 · [Pineapple pheno] | 50/50 | View variety |
| High Ball | Sunken Treasure Seeds | | 60/40 | View variety |
| High Biscus | Coastal Seed Co | | 40/60 | View variety |
| High Chew | Moscaseeds | | 60/40 | View variety |
| High Cloudz | Green House Seeds | | 50/50 | View variety |
| High Country Haze | 303 Seeds | | 50/50 | View variety |
| High Definition | Cult Classics Seeds | | 60/40 | View variety |
| High Density | Heavyweight Seeds | | 90/10 | View variety |
| High Flyer | Gage Green Genetics | | 40/60 | View variety |
| High Fructose | ThugPug Genetics | | 50/50 | View variety |
| High Intake | Strayfox Gardenz | | 50/50 | View variety |
| High Karate | Pacific NW Roots | | 80/20 | View variety |
| High Level | Eva Female Seeds | | 40/60 | View variety |