| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Lac de Bretaye' | Small | Blue/Green | Marginal | White | Unknown | Pale-Lavender | July into August | Hirsbrunner, Liselotte | .2003 |
| 'Lac Leman' | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | August to September | Hirsbrunner, Liselotte | .2001 |
| 'Lachman Legacy' | Large | Med-Green | Marginal | Yellow | Unknown | Pale-Lavender | June into July | Lachman, Wm & Eleanor | .2014 |
| 'Lady Gaga' | Small | Med-Green | Streaked | White | Hybrid | Pale-Lavender | August to September | Van Eechaute, Danny | .2014 |
| 'Lady Luck' | Medium | Med-Green | Marginal | White | Nat-Sport | Pale-Lavender | August to September | Van Eechaute, Danny | .2014 |
| 'Lady Macbeth' | Medium | Dark-Green | Medial | White | Nat-Sport | Pale-Lavender | June into July | Malloy, Alex | --NR-- |
| 'Lake Ontario' | Large | Dark-Green | Marginal | Yellow | Unknown | Pale-Lavender | July | Lydell, Ransom | .1999 |
| 'Lakeside Beloved' | Large | Dark-Green | Marginal | Green | Unknown | Pale-Lavender | July | Chastain, Mary | .1999 |
| 'Lakeside Cool Cat' | Large | Yellow | - | - | Unknown | - | - | Chastain, Mary | --NR-- |
| 'Lakeside Cranberry Relish' | Medium | Dark-Green | Marginal | White | Unknown | Pale-Lavender | July | Chastain, Mary | --NR-- |
| 'Lakeside Elite' | Medium | Dark-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July | Chastain, Mary | .2000 |
| 'Lakeside Emerald Lights' | Medium | Med-Green | - | - | Hybrid | Light-Purple | July | Chastain, Mary | .1993 |
| 'Lakeside Feather Light' | Medium | Med-Green | Marginal | White | Unknown | Pale-Lavender | July | Chastain, Mary | .1998 |
| 'Lakeside Gold Point' | Medium | Yellow | - | - | Unknown | Pale-Lavender | July | Chastain, Mary | .1995 |
| 'Lakeside Ladyfinger' | Small | Light-Green | Marginal | White | Unknown | Deep-Purple | July into August | Chastain, Mary | .1997 |
| 'Lakeside Lime Tart' | Small | Light-Green | - | - | Hybrid | Med-Lavender | July | Chastain, Mary | .2002 |
| 'Lakeside Misty' | Miniature | Light-Green | Streaked | Speckles | Unknown | - | - | Chastain, Mary | --NR-- |
| 'Lakeside Pin Cushion' | Medium | Yellow | - | - | Unknown | Pale-Lavender | July into August | Chastain, Mary | .2002 |
| 'Lakeside Ragtime' | Small | Med-Green | Marginal | Yellow | Unknown | Med-Lavender | July | Chastain, Mary | --NR-- |
| 'Lakeside Rhapsody' | Large | Blue/Green | Marginal | Creamy White | Unknown | Pale-Lavender | July | Chastain, Mary | .1995 |
| 'Lakeside Space Needle' | Small | Yellow | - | - | Unknown | - | - | Chastain, Mary | --NR-- |
| 'Lakeside Swan Pon' | Large | Dark-Green | Marginal | White | Unknown | Med-Lavender | July | Chastain, Mary | .2001 |
| 'Lakeside Top Gun' | Small | Yellow | - | - | Unknown | - | - | Chastain, Mary | --NR-- |
| 'Lakeside Wet Look' | - | Dark-Green | - | - | Unknown | - | - | Chastain, Mary | --NR-- |
| 'Lakeside Zinger Supreme' | Small | Med-Green | Streaked | White | Nat-Sport | Light-Purple | July | Chastain, Mary | --NR-- |
| 'Lambeau Leap' | Large | Dark-Green | Medial | Yellow | Unknown | Near-White | June into July | Finke, Chuck | .2016 |
| 'Last Dance' | Medium | Med-Green | Marginal | Greenish White | Nat-Sport | Pale-Lavender | July | Hansen, Hans | .1999 |
| 'Last Train Home' | Large | Med-Green | - | - | Nat-Sport | Near-White | June into July | Fransen, Marco & Joyce | --NR-- |
| 'Late Jewel' | Medium | Med-Green | - | - | Unknown | Light-Purple | August to September | Benedict, Dr R. (Herb) & Kuenster, Rod | .2010 |
| 'Laurentina' | Medium | Dark-Green | Streaked | Yellow | Hybrid | - | July into August | Lokies, Martin | .2014 |
| 'Lavender Love' | Small | Light-Green | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Laverne and Shirley' | Large | Yellow | - | - | TC Sport | Near-White | June into July | Zilis, Mark | .2009 |
| 'Leading Lady' | Large | Med-Green | Marginal | Creamy White | Hybrid | Pale-Lavender | July | Wilkins, Dr Jim | .1995 |
| 'Lean on Me' | Giant | Blue/Green | Medial | Yellow | Nat-Sport | - | June into July | Bisschop, Lynn | .2008 |
| 'Leapin' Lizard' | Medium | Med-Green | - | - | Hybrid | - | August to September | Beilstein, Doug & Mardy | .2012 |
| 'Leapin Lizard' | Medium | Med-Green | - | - | Hybrid | - | August to September | Beilstein, Doug & Mardy | .2012 |
| 'Leather Angel' | Large | Blue/Green | - | - | Unknown | Near-White | - | Henjum, Paul | --NR-- |
| 'Leather Belt' | Small | Dark-Green | Marginal | White | Nat-Sport | Pale-Lavender | August to September | Snyder, Ron | .2001 |
| 'Leather Strap' | Small | Dark-Green | - | - | Unknown | Light-Purple | July into August | Green Mountain Hosta | --NR-- |
| 'Lela's Quilt' | Large | Blue/Green | - | - | Hybrid | Pale-Lavender | June into July | Hackbarth, Robert | .2015 |
| 'Lemon Drop' | Medium | Yellow | - | - | Unknown | - | - | Lysne, Rod | --NR-- |
| 'Lemon Honey' | Medium | Yellow | - | - | Unknown | Pale-Lavender | June into July | Gilligan, Madelon | .2013 |
| 'Lemon Lime' | Medium | Light-Green | - | - | Hybrid | Deep-Purple | July | Savory, Robert | .1977 |
| 'Lemon Love Note' | Small | Light-Green | - | - | Hybrid | Med-Lavender | July | Beilstein, Doug | --NR-- |
| 'Lemon Slice' | Small | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Gilligan, Madelon | .2015 |
| 'Lemon Zest' | Miniature | Light-Green | - | - | Hybrid | - | - | Zilis, Mark | .2009 |
| 'Lemon Zinger' | Small | Light-Green | Marginal | Dark Green | TC Sport | Light-Purple | July into August | Solberg, Robert | .2019 |
| 'Lemontini' | Medium | Yellow | - | - | Hybrid | - | August to October | Zilis, Mark | .2009 |
| 'Lenape' | Large | Med-Green | - | - | Hybrid | Pale-Lavender | July | Wade, Van | .2007 |
| 'Leo' | Large | Yellow | - | - | Hybrid | Med-Lavender | July into August | Husemann, Jim | .2009 |
| 'Leola Fraim' | Large | Med-Green | Marginal | Creamy White | Hybrid | Med-Lavender | July | Lachman, Wm & Eleanor | .1986 |
| 'Leon' | Medium | Med-Green | - | - | Unknown | Light-Purple | August | Simpers, Lucille & Ruh, Peter | .1995 |
| 'Leona' | Medium | Yellow | - | - | Nat-Sport | Deep-Purple | July into August | Kuk, Bob | .2011 |
| 'Leprechaun Lace' | Medium | Med-Green | Marginal | Yellow | Unknown | Med-Lavender | - | Hackbarth, Robert | .2015 |
| 'Let's Dance' | Medium | Med-Green | Marginal | White | Hybrid | - | - | Ward, Dr Dick & Jane | .2012 |
| 'Leviathan' | Giant | Blue/Green | - | - | Hybrid | Near-White | June into July | Nesmith, Elizabeth & AHS | .1986 |
| 'Liam's Luck' | Small | Blue/Green | Medial | White | Nat-Sport | - | July into August | Keller, Robert | .2008 |
| 'Libby' | Medium | Dark-Green | Marginal | White | Hybrid | Pale-Lavender | August | Nyikos, Frank | .2003 |
| 'Libra' | Large | Med-Green | - | - | Unknown | - | June into August | Husemann, Jim | .2011 |
| 'Light My Fire' | Small | Blue/Green | Medial | White | Nat-Sport | Pale-Lavender | July into August | Zilis, Mark & Schwarz, Karen | .2014 |
| 'Light of Day' | Small | Blue/Green | Medial | Yellow | Unknown | Light-Purple | June into July | Dean, Don | .2016 |
| 'Lily Pad' | Medium | Dark-Green | - | - | Hybrid | Light-Purple | August | Solberg, Robert | .2000 |
| 'Lime Custard' | Large | Light-Green | - | - | Hybrid | - | July into August | Donsky, George | .2009 |
| 'Lime Knack' | Small | Light-Green | - | - | Hybrid | Med-Lavender | June into July | Kuenster, Rod | .2012 |
| 'Lime Leader' | Large | Light-Green | - | - | Unknown | - | June into July | Schulz, Ed | .2013 |
| 'Lime Ripple' | Large | Light-Green | - | - | Unknown | - | June into July | Schulz, Ed | .2011 |
| 'Lime Smoothie' | Large | Med-Green | Marginal | Yellow | Hybrid | - | June into July | Lefever, Wyatt & Solberg, Robert | .2008 |
| 'Lime Tiara' | Medium | Med-Green | - | - | TC Sport | Light-Purple | July into August | Zilis, Mark | .2011 |
| 'Lime Zest' | Miniature | Dark-Green | - | - | Hybrid | Light-Purple | August | Zilis, Mark | .2009 |
| 'Limetini' | Small | Light-Green | - | - | Hybrid | Light-Purple | August to September | Zilis, Mark | .2009 |
| 'Limited Edition' | Medium | Dark-Green | - | - | Hybrid | Pale-Lavender | June | Kamp, Gayle | .2001 |
| 'Lincoln' | Large | Dark-Green | Marginal | Yellow | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Lion Island' | Small | Med-Green | - | - | Nat-Sport | - | - | Schwarz, Jim | --NR-- |
| 'Lipstick Blonde' | Small | Yellow | - | - | Hybrid | Pale-Lavender | July into August | Van Eechaute, Danny | .2012 |
| 'Lisa Marie' | Medium | Med-Green | - | - | Hybrid | Med-Lavender | June into July | Livingston, Ron | --NR-- |
| 'Little Angel Wings' | Medium | Med-Green | Medial | White | Unknown | - | July into August | Zumbar, Wm | --NR-- |
| 'Little Aurora' | Medium | Yellow | - | - | Hybrid | Pale-Lavender | June | Aden, Paul | .1978 |
| 'Little Black Scape' | Medium | Light-Green | - | - | Hybrid | Light-Purple | July | Avent, Tony | .1995 |
| 'Little Fire' | Miniature | Yellow | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Little Jack Frost' | Medium | Blue/Green | - | - | Unknown | Pale-Lavender | August to September | Benedict, Dr R. (Herb) & Dorothy & Kuenster, Rod | .2010 |
| 'Little Jill' | Miniature | Med-Green | Streaked | White | Unknown | Light-Purple | August to September | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
| 'Little Jim' | Miniature | Med-Green | Streaked | White | Nat-Sport | Light-Purple | August | Benedict, Dr Ralph (Herb) | .1986 |
| 'Little Miss Sunshine' | Small | Yellow | - | - | Hybrid | - | July | Bergeron, Amy | .2008 |
| 'Little Missy' | Small | Med-Green | Marginal | White | Unknown | - | - | Terpening, Kent | --NR-- |
| 'Little Princess' | Miniature | Med-Green | - | - | Unknown | - | - | Wade, Van & Walek, Kevin | .2009 |
| 'Little Sister' | Small | Yellow | - | - | Hybrid | Pale-Lavender | July | Fisher, Eunice V. & Ruh, Peter & Jean | .2003 |
| 'Little Slam Bang' | Large | Med-Green | - | - | Unknown | - | August to September | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
| 'Little Starlet' | Small | Yellow | Marginal | White | TC Sport | Light-Purple | August | Zilis, Mark | .2011 |
| 'Little Stiffy' | Miniature | Med-Green | Marginal | Creamy White | Unknown | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Little Streaker' | Small | Med-Green | Marginal | White | Unknown | - | July into August | Wade, Van & Kuenster, Rod | .2010 |
| 'Little Town Flirt' | Medium | Dark-Green | Marginal | White | Unknown | - | - | Wasitis, Chick | .2008 |
| 'Little Willie' | Small | Med-Green | Marginal | White | Unknown | Light-Purple | July | Zumbar, Wm & Kuenster, Rod | .2010 |
| 'Little Wonder' | Small | Med-Green | Marginal | Yellow | Hybrid | Deep-Purple | July | Lachman, Wm & Eleanor | .1989 |
| 'Little Wonder Supreme' | Small | Med-Green | Streaked | White | Nat-Sport | Deep-Purple | July | Lachman, Wm & Eleanor | --NR-- |
| 'Lochness Monster' | Large | Yellow | - | - | Nat-Sport | Near-White | June | Brill, Kirk | --NR-- |
| 'Locksmith' | Giant | Med-Green | - | - | Hybrid | Near-White | - | Gilligan, Madelon | .2012 |
| 'Lois' | Large | Med-Green | Marginal | Yellow | Unknown | - | July into August | Schwarz, Jim & Karen | .2015 |
| 'Lollapalooza' | Large | Dark-Green | Marginal | White | Hybrid | Near-White | July | Elslager, Ed | .1998 |
| 'London Fog' | Medium | Yellow | Streaked | Speckles | TC Sport | Pale-Lavender | July | Zilis, Mark | .2006 |
| 'Lone Trail Gulch' | Large | Med-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July into August | Kuenster, Rod | .2011 |
| 'Lonesome Dove' | Medium | Blue/Green | Medial | White | Hybrid | Pale-Lavender | July | Hansen, Hans & Shady Oaks Nursery | .2005 |
| 'Lonesome Pine' | Large | Med-Green | Marginal | White | Unknown | - | - | Lachman, Wm & Eleanor | .1995 |
| 'Long Fellow' | Large | Light-Green | Marginal | White | Unknown | - | - | Goodwin, Randy | .2009 |
| 'Long Meadow' | Large | Yellow | - | - | Hybrid | - | June into July | Ward, Dr Dick & Jane | .2009 |
| 'Lord Rock' | Medium | Dark-Green | - | - | Hybrid | Pale-Lavender | June | Wade, Van | .2007 |
| 'Loretta's Lavender' | Medium | Dark-Green | - | - | Unknown | Med-Lavender | August to September | Schulz, Ed | .2005 |
| 'Lorna' | Small | Med-Green | - | - | Hybrid | Light-Purple | July | Benedict, Dr Ralph (Herb) | .1983 |
| 'Louie' | Miniature | Med-Green | - | - | Unknown | Light-Purple | August | Missouri Botanical Garden & Ruh, Peter | .1996 |
| 'Louie Louie' | Medium | Med-Green | Marginal | White | Hybrid | Med-Lavender | August | Dean, Don | .2014 |
| 'Louis XIV' | Giant | Yellow | - | - | Unknown | Pale-Lavender | June into July | Kedl, Phyllis | .2010 |
| 'Lovable Linda' | Medium | Med-Green | Marginal | White | Unknown | - | August to September | Chastain, Mary & Schwarz, Jim | .2015 |
| 'Love of Life' | Large | Med-Green | Marginal | Creamy White | Hybrid | Pale-Lavender | July into August | Krul, Nancy & Belle Gardens | .1998 |
| 'Love Poem' | Small | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Gilligan, Madelon | .2015 |
| 'Love Song' | Large | Med-Green | - | - | Hybrid | - | July into August | Van Eechaute, Danny | .2010 |
| 'Lovely Lauren' | Medium | Light-Green | Marginal | Yellow | Hybrid | - | July into August | Elslager, Ed | .1998 |
| 'Lovely Loretta' | Medium | Yellow | - | - | Hybrid | Light-Purple | July | Ruh, Peter | .1988 |
| 'Lovely Rita' | Small | Light-Green | Marginal | White | Unknown | Med-Lavender | - | Wasitis, Chick | --NR-- |
| 'Loyalist' | Medium | Med-Green | Medial | White | Nat-Sport | Pale-Lavender | July | Van Eijk-Bos, Gert & Falstad, Clarence | .1998 .2018 |
| 'Lucky in Love' | Small | Light-Green | Medial | White | Hybrid | - | July into August | Ward, Dr Dick & Jane | .2009 |
| 'Lucy and Ethel' | Large | Blue/Green | - | - | TC Sport | Near-White | June into July | Zilis, Mark | .2009 |
| 'Lydia' | Miniature | Med-Green | Medial | White | Nat-Sport | - | June into July | Graves, Butch | .2009 |
| 'Lydia's Buffet' | Small | Med-Green | Streaked | White | Unknown | - | July into August | Graves, Butch | .2008 |
| 'Lyme Regis' | Medium | Dark-Green | Medial | Yellow | Unknown | Pure-White | August | Skrocki, Ed & Walek, Kevin | .2009 |
|