| Iron Cobra | Red Scare Seed Company | | 80/20 | View variety |
| Iron Phaze | GreenMan Organic Seeds | | 40/60 | View variety |
| Iron Triangle | Colorado Seed Inc. | | 70/30 | View variety |
| Iron Triangle OG #9 BX | Colorado Seed Inc. | | 70/30 | View variety |
| IronSmith OG | Exclusive Seeds | | 60/40 | View variety |
| Isaac Haze | Bodhi Seeds | | 40/60 | View variety |
| Ishvara | DutchBreed | | 80/20 | View variety |
| Isis | Dutch Passion | | 20/80 | View variety |
| IsLAnd | DNA Genetics Seeds | | 80/20 | View variety |
| Island Apples | Elev8 Seeds | | 60/40 | View variety |
| Island Chill | Exotic Genetix | | 60/40 | View variety |
| Island Girl | Archive Seed Bank | | 50/50 | View variety |
| Island Mimosa | Twenty 20 Genetics | | 50/50 | View variety |
| Island Mt Strawberry Kush (The Whip! lineage, Twenty 20 Genetics) | Unknown | | Unavailable | View variety |
| Island Poison | Next Generation Seed Company | | 20/80 | View variety |
| Island Punch | The Cali Connection | | 60/40 | View variety |
| Island Punch Auto | The Cali Connection | | 50/50 | View variety |
| Island Sweet Barb | House Of The Great Gardener | | 60/40 | View variety |
| Island Sweet Skunk | Unknown | | 50/50 | View variety |
| Island Sweet Skunk | Federation Seed Company | | 50/50 | View variety |