| Cultivar Name | Plant Size | Origin | Flower Color | Season | Source | Registered |
| 'Jack and Margaret's Keynote' | Medium | Hybrid | Med-Lavender | July into August | Owens, Clarence | .2001 |
| 'Jackpot' | Large | Hybrid | Pure-White | July into August | Ward, Dr Dick & Ward, Jane | .1996 |
| 'James' | Large | Unknown | - | - | Wade, Van | --NR-- |
| 'James Monroe' | Medium | Unknown | Pale-Lavender | June into July | Sugita, Hajime & Ruh, Peter | .2005 |
| 'Jami' | Medium | Hybrid | Light-Purple | July into August | Nyikos, Frank | .2009 |
| 'Janet's Gold Sox' | Medium | Sport | Med-Lavender | July | Wade, Van | --NR-- |
| 'Jarno' | Medium | Hybrid | Pale-Lavender | July into August | Lokies, Martin | .2016 |
| 'Je Suis' | Medium | Hybrid | Med-Lavender | June into July | Gilligan, Madelon | .2017 |
| 'Jean Harlow' | Medium | Unknown | - | - | Brincka, Wm | --NR-- |
| 'Jericho' | Small | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Jim Brady' | Medium | Sport | Pale-Lavender | July | Unknown | --NR-- |
| 'Jim Cooper' | Large | Hybrid | Pale-Lavender | June into July | Aden, Paul | .1982 |
| 'Jim Hawes' | Medium | Hybrid | Med-Lavender | August to October | Hawes, James & Brill, Kirk | --NR-- |
| 'Jimmy Crack Corn' | Large | Hybrid | Near-White | June into July | Sawyer, Rick | --NR-- |
| 'Jipson Place Summer Solstice' | Giant | Unknown | Pale-Lavender | June into July | Butler, Dick & Street, Dr Jamie | .2016 |
| 'John Luke Picard' | Large | Sport | Near-White | June into July | Brill, Kirk | --NR-- |
| 'John Q. Adams' | Giant | Hybrid | Pale-Lavender | July | Ruh, Peter & Ruh, Jean | .2003 |
| 'Johnny Angel' | Large | Unknown | Near-White | June into July | Asch, Stuart | .2003 |
| 'Johnson's Olympic Gold' | Small | Hybrid | - | June into July | Freeman, Franc & Freeman, Sally | .2008 |
| 'Joy Adams' | Small | Unknown | - | - | Adams, Joy | --NR-- |
| 'Joybells' | Medium | Hybrid | Pale-Lavender | June into July | Minks, Eldren | .1980 |
| 'Judy's Surprise' | Medium | Hybrid | Light-Purple | June into July | Walek, Kevin | .1996 |
| 'July Gold' | - | Unknown | - | - | Lewis, Alan & Summers, Alex | --NR-- |
| 'June Gold' | Miniature | Sport | - | - | Anderson, Jim | --NR-- |
| 'June's Gold' | Small | Sport | Pale-Lavender | July into August | Minks, Eldren & Ruh, Peter | .2000 |
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