| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Lady in Red' | Small | Dark-Green | - | - | Unknown | Near-White | June into July | Whitmore, Bob & Avent, Tony | --NR-- |
| 'Laguna Seca' | Medium | Med-Green | - | - | Unknown | - | - | Visser, Cees | --NR-- |
| 'Lake Michigan' | Medium | Med-Green | - | - | Hybrid | Pale-Lavender | September to October | Lydell, Ransom | .2001 |
| 'Lakeside Cranberry Relish' | Medium | Dark-Green | Marginal | White | Unknown | Pale-Lavender | July | Chastain, Mary | --NR-- |
| 'Lakeside Flame Dance' | Medium | Med-Green | - | - | Unknown | Deep-Purple | August | Chastain, Mary | .2006 |
| 'Lakeside Zesty Zeno' | Medium | Med-Green | Marginal | Yellow | Unknown | Pale-Lavender | July into August | Chastain, Mary | .2004 |
| 'Lance Corporal' | Medium | - | - | - | Sport | Pale-Lavender | August to September | Van Eechaute, Danny | --NR-- |
| 'Lasergame' | Medium | Blue/Green | Streaked | Yellow | Hybrid | Pale-Lavender | - | Van Eechaute, Danny | --NR-- |
| 'Le Géant Beaupré' | Medium | Med-Green | - | - | Sport | Light-Purple | August | Bastille, Jocelyne | --NR-- |
| 'Le Rêve' | Small | Med-Green | Streaked | Yellow | Unknown | - | September | Bastille, Jocelyne | --NR-- |
| 'Leatherneck' | Giant | Blue/Green | - | - | Hybrid | Pale-Lavender | - | Nyikos, Frank | .1998 |
| 'Lemon Snap' | Medium | Yellow | - | - | Hybrid | Deep-Purple | July | Solberg, Robert | .2019 |
| 'Letha Mae' | Large | Med-Green | - | - | Unknown | Med-Lavender | July into August | Kuenster, Rod | .2006 |
| 'Lettuce Wrap' | Small | Yellow | | - | Unknown | Light-Purple | July into August | Solberg, Robert | .2019 |
| 'Lido' | Medium | Light-Green | Marginal | Yellow | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Li'l Smooch' | Miniature | Yellow | - | - | Unknown | Light-Purple | - | Wols, Dan | --NR-- |
| 'Lime Sours' | Miniature | Dark-Green | - | - | Hybrid | Med-Lavender | June into July | Gilligan, Madelon | .2018 |
| 'Limestone Lover' | Medium | Dark-Green | - | - | Hybrid | Near-White | August to October | Schulz, Ed | .2002 |
| 'Lipstick Blonde' | Small | Yellow | - | - | Hybrid | Pale-Lavender | July into August | Van Eechaute, Danny | .2012 |
| 'Lipstick on My Collar' | | - | | - | Unknown | - | - | Unknown | --NR-- |
| 'Lipstick Sunset' | Medium | Yellow | - | - | Hybrid | Light-Purple | July into August | Dean, Don | .2018 |
| 'Lisa Pauline Nash' | Medium | Med-Green | - | - | Unknown | - | - | Nash, Bill | --NR-- |
| 'Little Dancer' | Miniature | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Van Eechaute, Danny | .2013 |
| 'Little Jack Frost' | Medium | Blue/Green | - | - | Unknown | Pale-Lavender | August to September | Benedict, Dr Ralph (Herb) & Benedict, Dorothy & Kuenster, Rod | .2010 |
| 'Little Miss Magic' | Medium | Yellow | - | - | Hybrid | Med-Lavender | August | Solberg, Robert | .2004 |
| 'Little Red Joy' | Small | Med-Green | - | - | Hybrid | Pale-Lavender | August | Van Eechaute, Danny | .2004 |
| 'Little Red Rooster' | Small | Dark-Green | - | - | Hybrid | Pale-Lavender | - | Van Eechaute, Danny | .2002 |
| 'Little Red Wagon' | Small | Dark-Green | - | - | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Little Redneck' | Miniature | Dark-Green | - | - | Hybrid | Pale-Lavender | June into July | Avent, Tony | --NR-- |
| 'Little Rhubarb' | - | - | - | - | Unknown | - | - | Jentsch, Klaus | --NR-- |
| 'Little Slam Bang' | Large | Med-Green | - | - | Unknown | - | August to September | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
| 'Lois Jane' | Small | Med-Green | Streaked | White | Hybrid | Light-Purple | July into August | Milbradt, Marc | .2016 |
| 'Lone Trail Gulch' | Large | Med-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July into August | Kuenster, Rod | .2011 |
| 'Loretta's Lavender' | Medium | Dark-Green | - | - | Unknown | Med-Lavender | August to September | Schulz, Ed | .2005 |
| 'Lotsa Love' | Large | Blue/Green | - | - | Hybrid | - | - | Skaggs, Virginia & Skaggs, Brian | --NR-- |
| 'Lotte's Love' | Small | Light-Green | - | - | Hybrid | Pale-Lavender | July into August | Vissers, Louis | .2017 |
| 'Love in the Afternoon' | Medium | Blue/Green | Streaked | Yellow | Sport | Near-White | June | Brashear, Carol | --NR-- |
| 'Love of My Life' | Medium | Yellow | Marginal | Green | Hybrid | Med-Lavender | July into August | Solberg, Robert | .2019 |
| 'Love Spat' | Medium | Blue/Green | Streaked | Yellow | Sport | Near-White | June | White, Brian | --NR-- |
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