| Hell’s Fire Mango Thai | SnowHigh Seeds | | 90/10 | View variety |
| Helmand | The Real Seed Company | | 50/50 | View variety |
| Helvetic Cheese | Helvetic Seeds | | 20/80 | View variety |
| Hemp 4 (Morning Star lineage, Emerald Triangle) | Unknown | | Unavailable | View variety |
| Hempstar | Dutch Passion | | 20/80 | View variety |
| Hendrix Haze | Seattle Chronic Seeds | | 40/60 | View variety |
| Hendrix Headband | Alien Genetics | | 60/40 | View variety |
| Henkes Lolland | Growers Choice | | 50/50 | View variety |
| Henkes Lolland vs. Royal Dane | Growers Choice | | 50/50 | View variety |
| Hentai | Shuga Seeds | | 70/30 | View variety |
| Her Majesty | Delicatessen | | 10/90 | View variety |
| Herb | Cannarado Genetics | | 50/50 | View variety |
| Hercules | Colorado Seed Inc. | | 70/30 | View variety |
| Hercules #3 BX | Colorado Seed Inc. | | 70/30 | View variety |
| Here comes the Barb | House Of The Great Gardener | | 70/30 | View variety |
| Here's Johnny | Aficionado Seed Bank | | 40/60 | View variety |
| Herer Hashplant | Bodhi Seeds | | 60/40 | View variety |
| Heri Berry | Da Bean Co. | | 60/40 | View variety |
| Heri C99 | Da Bean Co. | | 60/40 | View variety |
| Heribei | Sannie's Seeds | | 50/50 | View variety |