| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Ugly Duckling' | Large | Yellow | Marginal | White | TC Sport | Med-Lavender | July | Zilis, Mark & Ruh, Peter | .1999 |
| 'Ulee's Gold' | Small | Yellow | - | - | Unknown | - | June into July | Treichel, Bernie | .2006 |
| 'Uncle Fester' | Large | Dark-Green | Marginal | Yellow | Unknown | - | - | Meyer, Bill | --NR-- |
| 'Uncle John' | Medium | Blue/Green | - | - | Hybrid | Near-White | July | Nyikos, Frank | .2000 |
| 'Uniquely Shirley Temple' | Medium | Dark-Green | Marginal | Light Green | Sport | Pale-Lavender | August | Rosenberg, Marlene & Goodrich, Jon | .2020 |
| 'Unsinkable Molly Brown' | Large | Dark-Green | Marginal | Green | Sport | Med-Lavender | July into August | Postlewaite, Peter | .2013 |
| 'Up in Smoke' | Medium | Blue/Green | | - | Hybrid | Pale-Lavender | July into August | Husemann, Jim | .2020 |
| 'Urban Cowboy' | Medium | Med-Green | Streaked | Yellow | TC Sport | Pale-Lavender | July | Zilis, Mark | .2009 |
| 'Utah Kid' | Small | Dark-Green | - | - | Unknown | - | - | Unknown | --NR-- |
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