| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Jabulani' | Large | Yellow | Marginal | Green | Sport | - | June into July | Zilis, Mark | .2010 |
| 'Jack's Gene' | Medium | Med-Green | - | - | Hybrid | Med-Lavender | July into August | Goodenough, Rick & Gilligan, Madelon | .2015 .2018 |
| 'Jade Cascade' | Giant | Med-Green | - | - | Unknown | Pale-Lavender | July | Heims, Dan & Walek, Kevin | .2009 |
| 'Jaded Geisha' | Medium | Med-Green | - | - | Sport | Light-Purple | August to September | Hawes, James | --NR-- |
| 'James Knox Polk' | Giant | Light-Green | - | - | Unknown | - | - | Ruh, Peter & Ruh, Jean | .2010 |
| 'Jami' | Medium | Yellow | - | - | Hybrid | Light-Purple | July into August | Nyikos, Frank | .2009 |
| 'Jammin' | Medium | Dark-Green | Streaked | White | Hybrid | - | July into August | Zilis, Mark | .2010 |
| 'Jan's Gift' | Medium | Dark-Green | Medial | White | Unknown | - | June into July | Liley, Jan & Gilligan, Madelon | .2015 |
| 'Jarett H Park' | Large | Dark-Green | - | - | Hybrid | Near-White | July into August | Chamberlain, Steve | .2003 |
| 'Jason' | - | Med-Green | Streaked | White | Sport | - | August to September | Snyder, Ron | .2002 |
| 'Jelly Belly' | Small | Light-Green | Streaked | Speckles | Sport | Med-Lavender | June into July | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
| 'Jen' | Large | Dark-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July into August | Goodwin, Randy | .2000 |
| 'Jessica Alba' | Medium | Light-Green | - | - | Sport | Med-Lavender | August to September | Van den Top, Jan | --NR-- |
| 'Jezebel' | Small | Med-Green | Marginal | Yellow | Sport | Pale-Lavender | July into August | McHugh, Ed | .2013 |
| 'Jiggy With It' | Large | Blue/Green | - | - | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Jilted Lover' | Medium | Dark-Green | Marginal | Yellow | Sport | Pale-Lavender | July | Zilis, Mark | .2010 |
| 'Jim Matthews' | Medium | Blue/Green | Medial | White | Hybrid | Pure-White | June into July | Matthews, Julian | .1998 |
| 'Jimmy' | Small | Med-Green | - | - | Hybrid | - | - | Wade, Van | --NR-- |
| 'Jipson Place Summer Solstice' | Giant | Yellow | - | - | Unknown | Pale-Lavender | June into July | Butler, Dick & Street, Dr Jamie | .2016 |
| 'Jipson Place Tree Top Lover' | Giant | Blue/Green | - | - | Unknown | - | June into July | Butler, Dick & Street, Dr Jamie | .2016 |
| 'Joan Altman' | Small | Light-Green | Marginal | Yellow | Unknown | Pale-Lavender | July into August | Kuk, Bob | .2011 |
| 'Job' | Medium | Blue/Green | - | - | Hybrid | - | June into August | Hermens, Pieter | .2012 |
| 'John Arva' | Large | Med-Green | - | - | Hybrid | Light-Purple | July into August | Zolock, Steve & Zolock, Sarah | .2007 |
| 'John Q. Adams' | Giant | Yellow | - | - | Hybrid | Pale-Lavender | July | Ruh, Peter & Ruh, Jean | .2003 |
| 'John Tyler' | Large | Blue/Green | - | - | Unknown | Light-Purple | July | Ruh, Peter & Zilis, Mark | .2011 |
| 'Jolly Green Dwarf' | Small | Med-Green | - | - | Hybrid | Deep-Purple | June into July | Avent, Tony | .2006 |
| 'Jordan's Heart' | Giant | Dark-Green | Marginal | White | Unknown | Med-Lavender | July into August | Foughty, C. & Asch, Stuart | .2011 |
| 'Joyful' | Medium | Med-Green | Marginal | White | TC Sport | Light-Purple | July into August | Zilis, Mark | .2003 |
| 'Jubilee' | Medium | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July into August | Ward, Dr Dick & Ward, Jane | .2009 |
| 'Jujen' | Large | Yellow | Marginal | White | Sport | Med-Lavender | June into July | Jones, Leonard | .2002 |
| 'Julia Ariana' | Large | Med-Green | Streaked | Yellow | Sport | Med-Lavender | July into August | Snyder, Ron | .2003 |
| 'Julie Wheeler' | Large | Dark-Green | Streaked | White | Hybrid | Med-Lavender | July into August | Zolock, Steve & Zolock, Sarah | .2009 |
| 'Jumbo Mouse Ears' | Miniature | Blue/Green | - | - | Sport | Pale-Lavender | June into July | Philips, Hugo | .2011 |
| 'June Present' | Medium | Blue/Green | Medial | Yellow | Sport | Pale-Lavender | July into August | Van den Top, Jan | --NR-- |
| 'June's Present' | Medium | Blue/Green | Medial | Yellow | Sport | Pale-Lavender | July into August | Van den Top, Jan | --NR-- |
| 'Jungle Fever' | Medium | Yellow | Streaked | White | Hybrid | Pale-Lavender | June | Ward, Dr Dick & Ward, Jane | .2013 |
| 'Just for Jane' | Medium | Dark-Green | Marginal | Yellow | Hybrid | - | - | Ward, Dr Dick & Ward, Jane | .2011 |
| 'Justa Gigolo' | Large | Med-Green | Streaked | Yellow | Hybrid | Near-White | August | Asch, Stuart | .2003 |
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