| Ft Collins Cough Trainwreck Haze | Rare Dankness Seeds | | 40/60 | View variety |
| FUBAR | Seeds of Compassion | | 50/50 | View variety |
| Fuck Around N Find Out | Olympic Seeds | | 60/40 | View variety |
| Fuckberry | Riot Seeds | | 50/50 | View variety |
| Fucking Chocolate | Amish Warrior Seeds | | 70/30 | View variety |
| Fucking Incredible | Vancouver Island Seed Company | | 80/20 | View variety |
| Fucktard | Real Gorilla Seeds | | 80/20 | View variety |
| Fudge Ripple | Wyeast Farms | | 60/40 | View variety |
| Fudge Ripple x Candy Rain | Tiki Madman | | 50/50 | View variety |
| Fudgsicle | Tiki Madman | | 50/50 | View variety |
| Fudo Myo-o [Japanese indica dom.] (Shangri-La lineage, Jinxproof Genetics) | Unknown | | Unavailable | View variety |
| Fuegisima | Atlas Seed | | 60/40 | View variety |
| Fuego | Lost River Seeds | | 50/50 | View variety |
| Fuego Verde | Ronin Garden | | 50/50 | View variety |
| Fuel | Connoisseur Genetics | | 60/40 | View variety |
| Fuel D.OG | Seedsman | | 60/40 | View variety |
| Fuel OG | Ripper Seeds | | 70/30 | View variety |
| Fuel Reserves | Red Scare Seed Company | | 60/40 | View variety |
| Fuel Stinkerz | Strayfox Gardenz | | 50/50 | View variety |
| Fuel Truck | Crockett Family Farms | | 60/40 | View variety |