| Cultivar | Reference | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Jack of Diamonds' | - Blind Lemon Jefferson | Medium | Blue/Green | Marginal | Yellow | Hybrid | Near-White | July | Savory, Robert | .1985 |
| 'Jaded Lady' | - Metal Band | Medium | Blue/Green | Medial | White | Unknown | - | - | Tylinski, Stan | --NR-- |
| 'Jambleliah' | - Hank Williams | Medium | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July | Aden, Paul | .1978 |
| 'Jammin' | - Music Term | Medium | Dark-Green | Streaked | White | Hybrid | - | July into August | Zilis, Mark | .2010 |
| 'Jazz Matazz' | - Guru Tribute | Medium | Light-Green | Marginal | Yellow | Hybrid | Med-Lavender | June | Simmering, Ron | .2000 |
| 'Jazzy' | - Music Term | Medium | Light-Green | Marginal | White | Sport | Med-Lavender | June | Simmering, Ron | .2000 |
| 'Jelly Roll Blues' | - Jelly Roll Morton | Large | Yellow | Streaked | Green | Hybrid | Near-White | July | Elslager, Ed | .2003 |
| 'Jim Dandy' | - LaVern Baker | - | - | - | - | Unknown | Med-Lavender | - | Unknown | --NR-- |
| 'Jimmy Crack Corn' | - Folk Song | Large | Yellow | - | - | Hybrid | Near-White | June into July | Sawyer, Rick | --NR-- |
| 'Jingle Bells' | - Christmas Carol | Medium | Dark-Green | - | - | Hybrid | Deep-Purple | August to October | Grapes, Vivian & The American Hosta Society | .1986 |
| 'Jipson Place Tree Top Lover' | - Jim Croce | Giant | Blue/Green | - | - | Unknown | - | June into July | Butler, Dick & Street, Dr Jamie | .2016 |
| 'John Denver' | - Folk Singer | Medium | Blue/Green | - | - | Hybrid | Near-White | June | Brill, Kirk | --NR-- |
| 'John Henry' | - Woody Guthrie | Medium | Med-Green | - | - | Hybrid | Light-Purple | August | Livingston, Ron | --NR-- |
| 'John Wells' | - Singer | Small | Med-Green | Streaked | White | Hybrid | Pale-Lavender | June into July | Zolock, Steve & Zolock, Sarah | .2002 |
| 'Johnny Angel' | - Shelly Fabrase | Large | Yellow | - | - | Unknown | Near-White | June into July | Asch, Stuart | .2003 |
| 'Jolly Roger' | - Roger McGuinn | Giant | Blue/Green | - | - | Unknown | - | - | Serafin, Viktoria | --NR-- |
| 'Jon's Song' | - Killing Heidi | Small | Med-Green | Marginal | Yellow | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Josephine' | - Chris Rea | Medium | Blue/Green | Marginal | White | Hybrid | Light-Purple | July into August | Kuk, Bob | .1987 |
| 'Joy, Unspeakable Joy' | - Hymn | - | - | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Jubilation' | - Paul Anka | Giant | Dark-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July | Wilkins, Dr Jim & Wilkins, Sandy | .2000 |
| 'Jubilee' | - Moss Hart | Medium | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July into August | Ward, Dr Dick & Ward, Jane | .2009 |
| 'Judy Blue Eyes' | - Crosby, Stills & Nash | Small | Blue/Green | - | - | Unknown | Med-Lavender | - | Wasitis, Chick | --NR-- |
| 'Judy's Amazing Grace' | - Hymn | Large | Blue/Green | - | - | Unknown | - | June into July | Treichel, Bernie | .2006 |
| 'Jumpin' Jack Flash' | - Rolling Stones | Small | Med-Green | Medial | White | Unknown | - | August to September | Avent, Tony | .2012 |
| 'Jumping Jupiter' | - Rockabilly Band | Small | Med-Green | Medial | White | Sport | Pale-Lavender | July | Malloy, Alex | --NR-- |
| 'June Spirit' | - Band | Medium | Yellow | Marginal | Blue-Green | TC Sport | Med-Lavender | July | Lichacz, Susan & Walters Gardens | .2012 |
| 'Jungle Fever' | - Stevie Wonder | Medium | Yellow | Streaked | White | Hybrid | Pale-Lavender | June | Ward, Dr Dick & Ward, Jane | .2013 |
| 'Just Livin' Life' | - Waka Flocka Flame | Medium | Blue/Green | - | - | Hybrid | - | - | Ziarek, Ken | --NR-- |
| 'Justa Gigolo' | - Louis Prima | Large | Med-Green | Streaked | Yellow | Hybrid | Near-White | August | Asch, Stuart | .2003 |
|