| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Yankee Doodle Dandy' | Medium | Med-Green | Streaked | Speckles | Hybrid | - | - | Balitewicz, Bob | --NR-- |
| 'Yashie' | Medium | Med-Green | - | - | Unknown | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Yellow Polka Dot Bikini' | Large | Dark-Green | Marginal | Yellow | Sport | Pale-Lavender | July into August | Jones, Leonard | .2005 |
| 'Yes, Sir!' | Large | Med-Green | - | - | Hybrid | - | July into August | Donsky, George | .2009 |
| 'Yesterday's Corn' | Small | Yellow | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Yikes Stripes' | Small | Blue/Green | - | - | Unknown | - | July into August | Megos, Stan | .2007 |
| 'Yikes! More Stripes' | Giant | Dark-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July into August | Elslager, Ed | .2004 |
| 'Yojimbo' | Large | Med-Green | - | - | Hybrid | Near-White | June into July | Ward, Dr Dick & Ward, Jane | .2003 |
| 'You Lie' | Large | Dark-Green | - | - | Unknown | Light-Purple | August to September | Freeman, Franc & Freeman, Sally | .2009 |
| 'You're Welcome' | Large | Med-Green | - | - | Sport | Light-Purple | July into August | Micheletti, Tom | .2011 |
| 'Yucca Ducka Do' | Medium | Med-Green | - | - | Hybrid | Light-Purple | August | Lydell, Ransom | .2000 |
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