| Hangover Haze | Dungeons Vault Genetics | | 60/40 | View variety |
| Hannibal OG | Unknown | | 50/50 | View variety |
| Hannibal OG F2 | Red Scare Seed Company | | 50/50 | View variety |
| Hannibal’s Temple | Red Scare Seed Company | | 70/30 | View variety |
| Hans Gruber | DNA Genetics Seeds | | 50/50 | View variety |
| HAOG (Ultimate OG lineage, Goat and Monkey Seeds) | Unknown | | Unavailable | View variety |
| Haole Brownie | Pakalolo Seed Moloka'i Hawaii | | 30/70 | View variety |
| Haole Moonshine | Dragons Flame Genetics | | 50/50 | View variety |
| Haoma | House Of The Great Gardener | | 80/20 | View variety |
| Hapa Haze | Centennial Seeds | | 40/60 | View variety |
| Happy Amnesia | Bald man Lala Seeds | | 70/30 | View variety |
| Happy Brother BX1 | Karma Genetics | | 90/10 | View variety |
| Happy Brother BX2 | Karma Genetics | | 100/0 | View variety |
| Happy Brother X Chemdog D IX1 | Karma Genetics | | 80/20 | View variety |
| Happy Chillmore | Pacific NW Roots | | 70/30 | View variety |
| Happy Ending | Unknown | | 50/50 | View variety |
| Happy Ending | SnowHigh Seeds | | 40/60 | View variety |
| Happy Ending | The Grateful Seeds | | 60/40 | View variety |
| Happy Hour | Lit Farms | | 60/40 | View variety |
| Happy Hour | Solfire Gardens | | 60/40 | View variety |