| Auto Xtremo | Cartel Seeds | 80 | ruderalis / indica / sativa | Only female | 
                    
                | X | Zamnesia | 74 | mostly sativa | Only female | 
                    
                | X Æ B-M04 | Humboldt Bred | 65 | indica / sativa | Only female | 
                    
                | X-15 | Lupos CannaSeed | 65 | indica / sativa | Only female | 
                    
                | X-18 3/4 Haze | White Buffalo Seed Collective | 90 | indica / sativa | Not feminised | 
                    
                | X-Berry | Apex Seeds | 52 | mostly indica | Only female | 
                    
                | X-Dog | Alpine-Seeds | 65 | mostly sativa | Not feminised | 
                    
                | X-File | Unknown or Legendary | - | mostly indica | Not feminised | 
                    
                | X-Haze | White Label | 73 | indica / sativa | Only female | 
                    
                | X-Kunk | Apex Seeds | 56 | mostly sativa | Only female | 
                    
                | X-Kush | Blue Stone Sanctuary | - | indica | Not feminised | 
                    
                | X-Kush #1 | Breeder Choice Organisation | 56 | indica | Not feminised | 
                    
                | X-Kush #2 | Breeder Choice Organisation | 63 | indica | Not feminised | 
                    
                | X-OH | White Buffalo Seed Collective | 77 | indica / sativa | Not feminised | 
                    
                | X-TRA CHZ | MTG Seeds | 60 | indica / sativa | Not feminised | 
                    
                | X-Wing | Unknown or Legendary | - | mostly indica | Not feminised | 
                    
                | X13 | Unknown or Legendary | - | mostly indica | Not feminised | 
                    
                | X18 | The Landrace Team | 60 | indica | Not feminised | 
                    
                | X18 | Tom Hill | 63 | indica | Not feminised | 
                    
                | X18 Pure Pakistani | Reserva Privada | 60 | indica | Only female | 
                    
                | Xanadu | Dutchgrown Seeds | 62 | mostly sativa | Not feminised | 
                    
                | Xanadu | Katsu Seeds | - | indica / sativa | Only female | 
                    
                | Xanthanite | Ronin Garden | 75 | ruderalis / indica / sativa | Only female | 
                    
                | Xeddar | All-in Medicinal Seeds | 53 | mostly indica | Only female | 
                    
                | Xena | Medtree | 65 | mostly sativa | Not feminised | 
                    
                | Xena | Exotic Genetix | - | unknown | Not feminised | 
                    
                | Xena OG | South Bay Genetics | 70 | indica / sativa | Not feminised | 
                    
                | Xenu | Cult Classics Seeds | 63 | indica / sativa | Not feminised | 
                    
                | Xfile | Mogwai Genetics | 61 | mostly indica | Not feminised | 
                    
                | Xhale | Elev8 Seeds | 60 | indica / sativa | Only female | 
                    
                | Xian | Shaolin Genetics | 65 | indica / sativa | Not feminised | 
                    
                | Xiezhi | Scapegoat Genetics | 63 | unknown | Not feminised | 
                    
                | Xingu | Maconha Seeds Bank | 55 | mostly indica | Only female | 
                    
                | Xinjiang Landrace | Landrace Bureau | 65 | ruderalis | Not feminised | 
                    
                | Xinjiang x Siberian | Landrace Bureau | 65 | ruderalis | Not feminised | 
                    
                | XJ-13 | Unknown or Legendary | - | mostly sativa | Not feminised | 
                    
                | XL Italian Shoes | Cult Classics Seeds | 60 | unknown | Only female | 
                    
                | Xmas Bud 1979 | Unknown or Legendary | - | mostly indica | Not feminised | 
                    
                | XmasDuck | Evolve Genetics | 70 | indica / sativa | Not feminised | 
                    
                | XMEN | Realpotency | 65 | mostly indica | Not feminised | 
                    
                | Xnine | Smiling Tiger | 63 | mostly indica | Not feminised | 
                    
                | XO Raspberry Glue | Haute Genetique | 63 | mostly indica | Not feminised | 
                    
                | Xocolope | Eskobar Seeds | 67 | mostly sativa | Not feminised | 
                    
                | Xodus #1 | Real Gorilla Seeds | 55 | indica / sativa | Only female | 
                    
                | XTC OG | Elev8 Seeds | 67 | mostly indica | Only female | 
                    
                | Xtreme Kush | Xtreme Seeds Co. | 70 | mostly indica | Only female | 
                    
                | XXL Cheese Auto | Landrace Bureau | 75 | ruderalis / indica / sativa | Not feminised | 
                    
                | XXX | Ethos Genetics | 60 | indica / sativa | Only female | 
                    
                | XXX Mints | Black Flag Genetics | 67 | indica / sativa | Not feminised |