| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Lac Leman' | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | August to September | Hirsbrunner, Liselotte | .2001 |
| 'Lake Chautauqua' | Large | Dark-Green | - | - | Unknown | Light-Purple | July | Sugita, Hajime & Ruh, Peter | .1998 |
| 'Lake Erie' | Giant | Med-Green | - | - | Hybrid | Near-White | June into July | Ruh, Peter | .1998 |
| 'Lake Hitchcock' | Medium | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | July | Lachman, Wm & Lachman, Eleanor & Walek, Kevin | .2009 |
| 'Lake Huron' | Medium | Med-Green | - | - | Hybrid | Light-Purple | August to October | Lydell, Ransom | .2001 |
| 'Lake Louise' | Large | Blue/Green | - | - | Hybrid | Near-White | June into July | Minks, Eldren | .1975 |
| 'Lake Michigan' | Medium | Med-Green | - | - | Hybrid | Pale-Lavender | September to October | Lydell, Ransom | .2001 |
| 'Lake Ontario' | Large | Dark-Green | Marginal | Yellow | Unknown | Pale-Lavender | July | Lydell, Ransom | .1999 |
| 'Lake Superior' | Giant | Blue/Green | - | - | Hybrid | Pure-White | July | Chastain, Mary & Lydell, Ransom | .2001 |
| 'Lake Wasilla' | Large | Blue/Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Lakeport Silver' | - | - | - | - | Unknown | - | - | Tompkins, Cynthia | --NR-- |
| 'Lakeside Breaking Waves' | Medium | Dark-Green | - | - | Unknown | Near-White | June into July | Chastain, Mary | .2003 |
| 'Lakeside Reflecting Pool' | Small | Med-Green | Streaked | White | Unknown | - | - | Chastain, Mary | --NR-- |
| 'Lakeside Surf Rider' | Large | Dark-Green | - | - | Hybrid | Near-White | June | Chastain, Mary | .1997 |
| 'Lakeside Waterfall' | Small | Yellow | - | - | Unknown | Near-White | June | Chastain, Mary | .1998 |
| 'Lakeside Wet Look' | - | Dark-Green | - | - | Unknown | - | - | Chastain, Mary | --NR-- |
| 'Lazy River' | Large | Med-Green | Streaked | Speckles | Sport | Near-White | July | Hawes, James | --NR-- |
| 'Lemon Waves' | Small | Yellow | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Lightning Bay' | Large | Dark-Green | Medial | Yellow | Sport | - | - | Trucks, Gary | --NR-- |
| 'Little Drip' | Small | Med-Green | Streaked | Speckles | Hybrid | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Little River' | Large | Med-Green | Medial | White | Sport | Near-White | July | Hawes, James | --NR-- |
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