| Fortune Teller | Gage Green Genetics | | 70/30 | View variety |
| Forum Cookies x OG Baddaz | Ripper Seeds | | 70/30 | View variety |
| Forum Cookies x Orange Sour Dub | Obsoul33t Genetics | | 60/40 | View variety |
| Forum Cut GSC BX | Sin City Seeds | | 60/40 | View variety |
| Forum Stomper | Mephisto Genetics | | 60/40 | View variety |
| Forum Tangie | James Loud Genetics | | 50/50 | View variety |
| Forumz | Robin Hood Seeds | | 60/40 | View variety |
| Forza Sans Souci | Bloom Seed Co | | 60/40 | View variety |
| Forza Sour | Unknown | | 70/30 | View variety |
| Forza Sour x Strawberry Guava | Bloom Seed Co | | 60/40 | View variety |
| Fossil Rox | Cannarado Genetics | | 80/20 | View variety |
| Foster | Anesia Seeds | | 60/40 | View variety |
| Fotia | Prolific Coast Seeds | | 70/30 | View variety |
| Foul Mouth | Dungeons Vault Genetics | | 60/40 | View variety |
| Four and More | The Seed Bank | | 50/50 | View variety |
| Four Prophets | DNA Genetics Seeds | | 60/40 | View variety |
| Four Way | Nirvana Seeds | | 60/40 | View variety |
| Four Way | Sensi Seeds | | 80/20 | View variety |
| Four Way Specials | High Quality Seeds | | 40/60 | View variety |
| Fourora | Coastal Seed Co | | 70/30 | View variety |